Search a number
-
+
621090 = 232567103
BaseRepresentation
bin10010111101000100010
31011112222100
42113220202
5124333330
621151230
75164521
oct2275042
91145870
10621090
113946a8
1225b516
13189912
141224b8
15c4060
hex97a22

621090 has 48 divisors (see below), whose sum is σ = 1654848. Its totient is φ = 161568.

The previous prime is 621083. The next prime is 621097. The reversal of 621090 is 90126.

It is an interprime number because it is at equal distance from previous prime (621083) and next prime (621097).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an Ulam number.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 621090.

It is not an unprimeable number, because it can be changed into a prime (621097) by changing a digit.

621090 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5979 + ... + 6081.

It is an arithmetic number, because the mean of its divisors is an integer number (34476).

2621090 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 621090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (827424).

621090 is an abundant number, since it is smaller than the sum of its proper divisors (1033758).

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

621090 is a wasteful number, since it uses less digits than its factorization.

621090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183 (or 180 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 621090 is about 788.0926341491. The cubic root of 621090 is about 85.3201307428.

The spelling of 621090 in words is "six hundred twenty-one thousand, ninety".

Divisors: 1 2 3 5 6 9 10 15 18 30 45 67 90 103 134 201 206 309 335 402 515 603 618 670 927 1005 1030 1206 1545 1854 2010 3015 3090 4635 6030 6901 9270 13802 20703 34505 41406 62109 69010 103515 124218 207030 310545 621090