900921660 has 24 divisors (see below), whose sum is σ = 2522580816. Its totient is φ = 240245760.

The previous prime is 900921641. The next prime is 900921667. The reversal of 900921660 is 66129009.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (900921667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7507621 + ... + 7507740.

It is an arithmetic number, because the mean of its divisors is an integer number (105107534).

Almost surely, 2^900921660 is an apocalyptic number.

It is an amenable number.

900921660 is an abundant number, since it is smaller than the sum of its proper divisors (1621659156).

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

900921660 is a wasteful number, since it uses less digits than its factorization.

900921660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15015373 (or 15015371 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 900921660 is about 30015.3570693404. The cubic root of 900921660 is about 965.8188473325.

The spelling of 900921660 in words is "nine hundred million, nine hundred twenty-one thousand, six hundred sixty".