91856874 has 16 divisors (see below), whose sum is σ = 185533920. Its totient is φ = 30315600.

The previous prime is 91856873. The next prime is 91856881. The reversal of 91856874 is 47865819.

It is not an unprimeable number, because it can be changed into a prime (91856873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75184 + ... + 76395.

It is an arithmetic number, because the mean of its divisors is an integer number (11595870).

Almost surely, 2^91856874 is an apocalyptic number.

91856874 is an abundant number, since it is smaller than the sum of its proper divisors (93677046).

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

91856874 is a wasteful number, since it uses less digits than its factorization.

91856874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151685.

The product of its digits is 483840, while the sum is 48.

The square root of 91856874 is about 9584.1991840738. The cubic root of 91856874 is about 451.2015198977.

The spelling of 91856874 in words is "ninety-one million, eight hundred fifty-six thousand, eight hundred seventy-four".