91408814 has 32 divisors (see below), whose sum is σ = 160876800. Its totient is φ = 38936184.

The previous prime is 91408799. The next prime is 91408861. The reversal of 91408814 is 41880419.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155429 + ... + 156015.

It is an arithmetic number, because the mean of its divisors is an integer number (5027400).

Almost surely, 2^91408814 is an apocalyptic number.

91408814 is a deficient number, since it is larger than the sum of its proper divisors (69467986).

91408814 is a wasteful number, since it uses less digits than its factorization.

91408814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 837 (or 823 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 91408814 is about 9560.7956781849. The cubic root of 91408814 is about 450.4666993534.

The spelling of 91408814 in words is "ninety-one million, four hundred eight thousand, eight hundred fourteen".