90000056 has 8 divisors (see below), whose sum is σ = 168750120. Its totient is φ = 45000024.

The previous prime is 90000049. The next prime is 90000059. The reversal of 90000056 is 65000009.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 89999992 and 90000037.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90000059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5624996 + ... + 5625011.

It is an arithmetic number, because the mean of its divisors is an integer number (21093765).

Almost surely, 2^90000056 is an apocalyptic number.

It is an amenable number.

90000056 is a deficient number, since it is larger than the sum of its proper divisors (78750064).

90000056 is a wasteful number, since it uses less digits than its factorization.

90000056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11250013 (or 11250009 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 90000056 is about 9486.8359319638. The cubic root of 90000056 is about 448.1405676034.

The spelling of 90000056 in words is "ninety million, fifty-six", and thus it is an aban number and an uban number.