91456428 has 48 divisors (see below), whose sum is σ = 244500480. Its totient is φ = 26064384.

The previous prime is 91456427. The next prime is 91456439. The reversal of 91456428 is 82465419.

It is not an unprimeable number, because it can be changed into a prime (91456427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39100 + ... + 41372.

It is an arithmetic number, because the mean of its divisors is an integer number (5093760).

Almost surely, 2^91456428 is an apocalyptic number.

It is an amenable number.

91456428 is an abundant number, since it is smaller than the sum of its proper divisors (153044052).

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

91456428 is a wasteful number, since it uses less digits than its factorization.

91456428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2766 (or 2764 counting only the distinct ones).

The product of its digits is 69120, while the sum is 39.

The square root of 91456428 is about 9563.2854187251. The cubic root of 91456428 is about 450.5449004132.

The spelling of 91456428 in words is "ninety-one million, four hundred fifty-six thousand, four hundred twenty-eight".