91401408 has 84 divisors (see below), whose sum is σ = 299425360. Its totient is φ = 26113536.

The previous prime is 91401403. The next prime is 91401421. The reversal of 91401408 is 80410419.

It is a tau number, because it is divible by the number of its divisors (84).

It is not an unprimeable number, because it can be changed into a prime (91401403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7303 + ... + 15366.

Almost surely, 2^91401408 is an apocalyptic number.

It is an amenable number.

91401408 is an abundant number, since it is smaller than the sum of its proper divisors (208023952).

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

91401408 is a wasteful number, since it uses less digits than its factorization.

91401408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22694 (or 22681 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 91401408 is about 9560.4083594792. The cubic root of 91401408 is about 450.4545333257.

It can be divided in two parts, 91401 and 408, that added together give a square (91809 = 303²).

The spelling of 91401408 in words is "ninety-one million, four hundred one thousand, four hundred eight".