90028512 has 72 divisors (see below), whose sum is σ = 292599216. Its totient is φ = 25721856.

The previous prime is 90028507. The next prime is 90028537. The reversal of 90028512 is 21582009.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

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, 20313 + ... + 24344.

It is an arithmetic number, because the mean of its divisors is an integer number (4063878).

Almost surely, 2^90028512 is an apocalyptic number.

It is an amenable number.

90028512 is an abundant number, since it is smaller than the sum of its proper divisors (202570704).

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

90028512 is a wasteful number, since it uses less digits than its factorization.

90028512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44680 (or 44669 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 90028512 is about 9488.3355758531. The cubic root of 90028512 is about 448.1877932933.

The spelling of 90028512 in words is "ninety million, twenty-eight thousand, five hundred twelve".