91408554 has 32 divisors (see below), whose sum is σ = 203773440. Its totient is φ = 30373056.

The previous prime is 91408549. The next prime is 91408651. The reversal of 91408554 is 45580419.

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, 15687 + ... + 20709.

It is an arithmetic number, because the mean of its divisors is an integer number (6367920).

Almost surely, 2^91408554 is an apocalyptic number.

91408554 is an abundant number, since it is smaller than the sum of its proper divisors (112364886).

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

91408554 is a wasteful number, since it uses less digits than its factorization.

91408554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5371 (or 5365 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 91408554 is about 9560.7820809806. The cubic root of 91408554 is about 450.4662722558.

The spelling of 91408554 in words is "ninety-one million, four hundred eight thousand, five hundred fifty-four".