90153992 has 16 divisors (see below), whose sum is σ = 178982460. Its totient is φ = 42425344.

The previous prime is 90153989. The next prime is 90154021. The reversal of 90153992 is 29935109.

It can be written as a sum of positive squares in 2 ways, for example, as 90136036 + 17956 = 9494^2 + 134^2 .

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, 331313 + ... + 331584.

Almost surely, 2^90153992 is an apocalyptic number.

It is an amenable number.

90153992 is a deficient number, since it is larger than the sum of its proper divisors (88828468).

90153992 is a wasteful number, since it uses less digits than its factorization.

90153992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662920 (or 662916 counting only the distinct ones).

The product of its (nonzero) digits is 21870, while the sum is 38.

The square root of 90153992 is about 9494.9456027931. The cubic root of 90153992 is about 448.3959217894.

The spelling of 90153992 in words is "ninety million, one hundred fifty-three thousand, nine hundred ninety-two".