91408866 has 32 divisors (see below), whose sum is σ = 187273728. Its totient is φ = 29735040.

The previous prime is 91408861. The next prime is 91408871. The reversal of 91408866 is 66880419.

It is an interprime number because it is at equal distance from previous prime (91408861) and next prime (91408871).

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 15 ways as a sum of consecutive naturals, for example, 49231 + ... + 51053.

It is an arithmetic number, because the mean of its divisors is an integer number (5852304).

Almost surely, 2^91408866 is an apocalyptic number.

91408866 is an abundant number, since it is smaller than the sum of its proper divisors (95864862).

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

91408866 is a wasteful number, since it uses less digits than its factorization.

91408866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2026.

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 91408866 is about 9560.7983976235. The cubic root of 91408866 is about 450.4667847728.

The spelling of 91408866 in words is "ninety-one million, four hundred eight thousand, eight hundred sixty-six".