90890136 has 24 divisors (see below), whose sum is σ = 246160980. Its totient is φ = 30296688.

The previous prime is 90890101. The next prime is 90890159. The reversal of 90890136 is 63109809.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×90890136² = 16522033644196992, which contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 90890136.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 631110 + ... + 631253.

Almost surely, 2^90890136 is an apocalyptic number.

It is an amenable number.

90890136 is an abundant number, since it is smaller than the sum of its proper divisors (155270844).

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

90890136 is a wasteful number, since it uses less digits than its factorization.

90890136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1262375 (or 1262368 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 90890136 is about 9533.6318368185. The cubic root of 90890136 is about 449.6130599711.

The spelling of 90890136 in words is "ninety million, eight hundred ninety thousand, one hundred thirty-six".