91279404 has 36 divisors (see below), whose sum is σ = 231054096. Its totient is φ = 30384288.

The previous prime is 91279403. The next prime is 91279421. The reversal of 91279404 is 40497219.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (91279403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35217 + ... + 37719.

Almost surely, 2^91279404 is an apocalyptic number.

It is an amenable number.

91279404 is an abundant number, since it is smaller than the sum of its proper divisors (139774692).

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

91279404 is a wasteful number, since it uses less digits than its factorization.

91279404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3526 (or 3521 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 91279404 is about 9554.0255390071. The cubic root of 91279404 is about 450.2540195450.

The spelling of 91279404 in words is "ninety-one million, two hundred seventy-nine thousand, four hundred four".