91580490 has 32 divisors (see below), whose sum is σ = 244215360. Its totient is φ = 24421392.

The previous prime is 91580483. The next prime is 91580501. The reversal of 91580490 is 9408519.

91580490 is a `hidden beast` number, since 91 + 5 + 80 + 490 = 666.

It is a super-2 number, since 2×91580490² = 16773972297280200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169324 + ... + 169863.

It is an arithmetic number, because the mean of its divisors is an integer number (7631730).

Almost surely, 2^91580490 is an apocalyptic number.

91580490 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

91580490 is an abundant number, since it is smaller than the sum of its proper divisors (152634870).

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

91580490 is a wasteful number, since it uses less digits than its factorization.

91580490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339203 (or 339197 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 91580490 is about 9569.7695897028. The cubic root of 91580490 is about 450.7485319760.

The spelling of 91580490 in words is "ninety-one million, five hundred eighty thousand, four hundred ninety".