91782428 has 12 divisors (see below), whose sum is σ = 161310240. Its totient is φ = 45693792.

The previous prime is 91782421. The next prime is 91782433. The reversal of 91782428 is 82428719.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91782421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48308 + ... + 50171.

It is an arithmetic number, because the mean of its divisors is an integer number (13442520).

Almost surely, 2^91782428 is an apocalyptic number.

It is an amenable number.

91782428 is a deficient number, since it is larger than the sum of its proper divisors (69527812).

91782428 is a wasteful number, since it uses less digits than its factorization.

91782428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98716 (or 98714 counting only the distinct ones).

The product of its digits is 64512, while the sum is 41.

The square root of 91782428 is about 9580.3146086128. The cubic root of 91782428 is about 451.0795938859.

The spelling of 91782428 in words is "ninety-one million, seven hundred eighty-two thousand, four hundred twenty-eight".