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90730780 = 22573072111
BaseRepresentation
bin1010110100001…
…11000100011100
320022201121020021
411122013010130
5141211341110
613000401524
72151125140
oct532070434
9208647207
1090730780
1147240418
12264762a4
1315a4976a
14c09b220
157e732da
hex568711c

90730780 has 48 divisors (see below), whose sum is σ = 218566656. Its totient is φ = 30991680.

The previous prime is 90730733. The next prime is 90730781. The reversal of 90730780 is 8703709.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90730781) 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, 41925 + ... + 44035.

It is an arithmetic number, because the mean of its divisors is an integer number (4553472).

Almost surely, 290730780 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 90730780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109283328).

90730780 is an abundant number, since it is smaller than the sum of its proper divisors (127835876).

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

90730780 is a wasteful number, since it uses less digits than its factorization.

90730780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2434 (or 2432 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 90730780 is about 9525.2705998307. The cubic root of 90730780 is about 449.3501401570.

The spelling of 90730780 in words is "ninety million, seven hundred thirty thousand, seven hundred eighty".

Divisors: 1 2 4 5 7 10 14 20 28 35 70 140 307 614 1228 1535 2111 2149 3070 4222 4298 6140 8444 8596 10555 10745 14777 21110 21490 29554 42220 42980 59108 73885 147770 295540 648077 1296154 2592308 3240385 4536539 6480770 9073078 12961540 18146156 22682695 45365390 90730780