90836172 has 36 divisors (see below), whose sum is σ = 262416336. Its totient is φ = 25953120.

The previous prime is 90836129. The next prime is 90836173. The reversal of 90836172 is 27163809.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×90836172² = 16502420287227168, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (90836173) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 179979 + ... + 180482.

Almost surely, 2^90836172 is an apocalyptic number.

It is an amenable number.

90836172 is an abundant number, since it is smaller than the sum of its proper divisors (171580164).

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

90836172 is a wasteful number, since it uses less digits than its factorization.

90836172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360478 (or 360473 counting only the distinct ones).

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

The square root of 90836172 is about 9530.8012255004. The cubic root of 90836172 is about 449.5240597646.

The spelling of 90836172 in words is "ninety million, eight hundred thirty-six thousand, one hundred seventy-two".