Search a number
-
+
90808480 = 255789911
BaseRepresentation
bin1010110100110…
…10000010100000
320022212112211001
411122122002200
5141221332410
613002201344
72151600520
oct532320240
9208775731
1090808480
1147293834
12264b3254
1315a75c39
14c0bb680
157e8b33a
hex569a0a0

90808480 has 96 divisors (see below), whose sum is σ = 248209920. Its totient is φ = 30750720.

The previous prime is 90808477. The next prime is 90808489. The reversal of 90808480 is 8480809.

It is not an unprimeable number, because it can be changed into a prime (90808489) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99225 + ... + 100135.

It is an arithmetic number, because the mean of its divisors is an integer number (2585520).

Almost surely, 290808480 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90808480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124104960).

90808480 is an abundant number, since it is smaller than the sum of its proper divisors (157401440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90808480 is a wasteful number, since it uses less digits than its factorization.

90808480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1022 (or 1014 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 37.

The square root of 90808480 is about 9529.3483512778. The cubic root of 90808480 is about 449.4783750072.

The spelling of 90808480 in words is "ninety million, eight hundred eight thousand, four hundred eighty".

Divisors: 1 2 4 5 7 8 10 14 16 20 28 32 35 40 56 70 80 89 112 140 160 178 224 280 356 445 560 623 712 890 911 1120 1246 1424 1780 1822 2492 2848 3115 3560 3644 4555 4984 6230 6377 7120 7288 9110 9968 12460 12754 14240 14576 18220 19936 24920 25508 29152 31885 36440 49840 51016 63770 72880 81079 99680 102032 127540 145760 162158 204064 255080 324316 405395 510160 567553 648632 810790 1020320 1135106 1297264 1621580 2270212 2594528 2837765 3243160 4540424 5675530 6486320 9080848 11351060 12972640 18161696 22702120 45404240 90808480