91408868 has 12 divisors (see below), whose sum is σ = 160039152. Its totient is φ = 45683400.

The previous prime is 91408861. The next prime is 91408871. The reversal of 91408868 is 86880419.

It is a happy number.

It is a super-2 number, since 2×91408868² = 16711162298082848, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (91408861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8543 + ... + 15993.

It is an arithmetic number, because the mean of its divisors is an integer number (13336596).

Almost surely, 2^91408868 is an apocalyptic number.

It is an amenable number.

91408868 is a deficient number, since it is larger than the sum of its proper divisors (68630284).

91408868 is a wasteful number, since it uses less digits than its factorization.

91408868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10522 (or 10520 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 44.

The square root of 91408868 is about 9560.7985022173. The cubic root of 91408868 is about 450.4667880581.

The spelling of 91408868 in words is "ninety-one million, four hundred eight thousand, eight hundred sixty-eight".