900020624 has 10 divisors (see below), whose sum is σ = 1743789990. Its totient is φ = 450010304.

The previous prime is 900020623. The next prime is 900020629. The reversal of 900020624 is 426020009.

It can be written as a sum of positive squares in only one way, i.e., 630010000 + 270010624 = 25100^2 + 16432^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 900020624.

It is not an unprimeable number, because it can be changed into a prime (900020621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28125629 + ... + 28125660.

It is an arithmetic number, because the mean of its divisors is an integer number (174378999).

Almost surely, 2^900020624 is an apocalyptic number.

It is an amenable number.

900020624 is a deficient number, since it is larger than the sum of its proper divisors (843769366).

900020624 is a wasteful number, since it uses less digits than its factorization.

900020624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56251297 (or 56251291 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 900020624 is about 30000.3437313641. The cubic root of 900020624 is about 965.4967594578.

The spelling of 900020624 in words is "nine hundred million, twenty thousand, six hundred twenty-four".