90613872 has 30 divisors (see below), whose sum is σ = 253593392. Its totient is φ = 30204576.

The previous prime is 90613829. The next prime is 90613877. The reversal of 90613872 is 27831609.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90613877) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 314488 + ... + 314775.

Almost surely, 2^90613872 is an apocalyptic number.

It is an amenable number.

90613872 is an abundant number, since it is smaller than the sum of its proper divisors (162979520).

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

90613872 is a wasteful number, since it uses less digits than its factorization.

90613872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629277 (or 629268 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 90613872 is about 9519.1318931928. The cubic root of 90613872 is about 449.1570590241.

The spelling of 90613872 in words is "ninety million, six hundred thirteen thousand, eight hundred seventy-two".