9120621860 has 36 divisors (see below), whose sum is σ = 22280378652. Its totient is φ = 3127070016.

The previous prime is 9120621827. The next prime is 9120621883. The reversal of 9120621860 is 681260219.

It can be written as a sum of positive squares in 2 ways, for example, as 3396791524 + 5723830336 = 58282^2 + 75656^2 .

It is a super-3 number, since 3×9120621860³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 9120621860.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4652399 + ... + 4654358.

It is an arithmetic number, because the mean of its divisors is an integer number (618899407).

Almost surely, 2^9120621860 is an apocalyptic number.

It is an amenable number.

9120621860 is an abundant number, since it is smaller than the sum of its proper divisors (13159756792).

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

9120621860 is a wasteful number, since it uses less digits than its factorization.

9120621860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9306780 (or 9306771 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 9120621860 is about 95501.9468911498. The cubic root of 9120621860 is about 2089.3353395736.

The spelling of 9120621860 in words is "nine billion, one hundred twenty million, six hundred twenty-one thousand, eight hundred sixty".