90091536 has 40 divisors (see below), whose sum is σ = 238154400. Its totient is φ = 29331456.

The previous prime is 90091471. The next prime is 90091537. The reversal of 90091536 is 63519009.

It is a junction number, because it is equal to n+sod(n) for n = 90091497 and 90091506.

It is not an unprimeable number, because it can be changed into a prime (90091537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19761 + ... + 23888.

It is an arithmetic number, because the mean of its divisors is an integer number (5953860).

Almost surely, 2^90091536 is an apocalyptic number.

It is an amenable number.

90091536 is an abundant number, since it is smaller than the sum of its proper divisors (148062864).

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

90091536 is a wasteful number, since it uses less digits than its factorization.

90091536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43703 (or 43697 counting only the distinct ones).

The product of its (nonzero) digits is 7290, while the sum is 33.

The square root of 90091536 is about 9491.6561252502. The cubic root of 90091536 is about 448.2923527569.

The spelling of 90091536 in words is "ninety million, ninety-one thousand, five hundred thirty-six".