91550490 has 32 divisors (see below), whose sum is σ = 221460480. Its totient is φ = 24220224.

The previous prime is 91550479. The next prime is 91550497. The reversal of 91550490 is 9405519.

It is not an unprimeable number, because it can be changed into a prime (91550497) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8205 + ... + 15824.

It is an arithmetic number, because the mean of its divisors is an integer number (6920640).

Almost surely, 2^91550490 is an apocalyptic number.

91550490 is an abundant number, since it is smaller than the sum of its proper divisors (129909990).

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

91550490 is a wasteful number, since it uses less digits than its factorization.

91550490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24166.

The product of its (nonzero) digits is 8100, while the sum is 33.

The square root of 91550490 is about 9568.2020254591. The cubic root of 91550490 is about 450.6993077625.

The spelling of 91550490 in words is "ninety-one million, five hundred fifty thousand, four hundred ninety".