90428972 has 12 divisors (see below), whose sum is σ = 158620896. Its totient is φ = 45108720.

The previous prime is 90428963. The next prime is 90429007. The reversal of 90428972 is 27982409.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24503 + ... + 27950.

It is an arithmetic number, because the mean of its divisors is an integer number (13218408).

Almost surely, 2^90428972 is an apocalyptic number.

It is an amenable number.

90428972 is a deficient number, since it is larger than the sum of its proper divisors (68191924).

90428972 is a wasteful number, since it uses less digits than its factorization.

90428972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52888 (or 52886 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 90428972 is about 9509.4149136527. The cubic root of 90428972 is about 448.8513453753.

The spelling of 90428972 in words is "ninety million, four hundred twenty-eight thousand, nine hundred seventy-two".