90657628 has 24 divisors (see below), whose sum is σ = 167892480. Its totient is φ = 42744240.

The previous prime is 90657599. The next prime is 90657691. The reversal of 90657628 is 82675609.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 408 + ... + 13471.

It is an arithmetic number, because the mean of its divisors is an integer number (6995520).

Almost surely, 2^90657628 is an apocalyptic number.

It is an amenable number.

90657628 is a deficient number, since it is larger than the sum of its proper divisors (77234852).

90657628 is a wasteful number, since it uses less digits than its factorization.

90657628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13977 (or 13975 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 90657628 is about 9521.4299346264. The cubic root of 90657628 is about 449.2293443275.

The spelling of 90657628 in words is "ninety million, six hundred fifty-seven thousand, six hundred twenty-eight".