91894728 has 16 divisors (see below), whose sum is σ = 229736880. Its totient is φ = 30631568.

The previous prime is 91894711. The next prime is 91894753. The reversal of 91894728 is 82749819.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1914450 + ... + 1914497.

It is an arithmetic number, because the mean of its divisors is an integer number (14358555).

Almost surely, 2^91894728 is an apocalyptic number.

It is an amenable number.

91894728 is an abundant number, since it is smaller than the sum of its proper divisors (137842152).

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

91894728 is a wasteful number, since it uses less digits than its factorization.

91894728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3828956 (or 3828952 counting only the distinct ones).

The product of its digits is 290304, while the sum is 48.

The square root of 91894728 is about 9586.1737935424. The cubic root of 91894728 is about 451.2634910779.

The spelling of 91894728 in words is "ninety-one million, eight hundred ninety-four thousand, seven hundred twenty-eight".