91379828 has 24 divisors (see below), whose sum is σ = 176686272. Its totient is φ = 41131904.

The previous prime is 91379803. The next prime is 91379831. The reversal of 91379828 is 82897319.

It is a congruent number.

It is an unprimeable number.

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, 27650 + ... + 30777.

It is an arithmetic number, because the mean of its divisors is an integer number (7361928).

Almost surely, 2^91379828 is an apocalyptic number.

It is an amenable number.

91379828 is a deficient number, since it is larger than the sum of its proper divisors (85306444).

91379828 is a wasteful number, since it uses less digits than its factorization.

91379828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58471 (or 58469 counting only the distinct ones).

The product of its digits is 217728, while the sum is 47.

The square root of 91379828 is about 9559.2796799759. The cubic root of 91379828 is about 450.4190795540.

The spelling of 91379828 in words is "ninety-one million, three hundred seventy-nine thousand, eight hundred twenty-eight".