91397260 has 24 divisors (see below), whose sum is σ = 193732560. Its totient is φ = 36216384.

The previous prime is 91397249. The next prime is 91397261. The reversal of 91397260 is 6279319.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (91397261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19215 + ... + 23494.

It is an arithmetic number, because the mean of its divisors is an integer number (8072190).

Almost surely, 2^91397260 is an apocalyptic number.

It is an amenable number.

91397260 is an abundant number, since it is smaller than the sum of its proper divisors (102335300).

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

91397260 is a wasteful number, since it uses less digits than its factorization.

91397260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42825 (or 42823 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 91397260 is about 9560.1914206777. The cubic root of 91397260 is about 450.4477190117.

The spelling of 91397260 in words is "ninety-one million, three hundred ninety-seven thousand, two hundred sixty".