900390720 has 112 divisors (see below), whose sum is σ = 3026956608. Its totient is φ = 225976320.

The previous prime is 900390713. The next prime is 900390731. The reversal of 900390720 is 27093009.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11266 + ... + 43905.

Almost surely, 2^900390720 is an apocalyptic number.

It is an amenable number.

900390720 is an abundant number, since it is smaller than the sum of its proper divisors (2126565888).

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

900390720 is a wasteful number, since it uses less digits than its factorization.

900390720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55208 (or 55198 counting only the distinct ones).

The product of its (nonzero) digits is 3402, while the sum is 30.

The square root of 900390720 is about 30006.5112933843. The cubic root of 900390720 is about 965.6290814335.

The spelling of 900390720 in words is "nine hundred million, three hundred ninety thousand, seven hundred twenty".