91791480 has 64 divisors (see below), whose sum is σ = 300412800. Its totient is φ = 22252160.

The previous prime is 91791473. The next prime is 91791493. The reversal of 91791480 is 8419719.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33450 + ... + 36089.

It is an arithmetic number, because the mean of its divisors is an integer number (4693950).

Almost surely, 2^91791480 is an apocalyptic number.

It is an amenable number.

91791480 is an abundant number, since it is smaller than the sum of its proper divisors (208621320).

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

91791480 is a wasteful number, since it uses less digits than its factorization.

91791480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69564 (or 69560 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 39.

The square root of 91791480 is about 9580.7870240393. The cubic root of 91791480 is about 451.0944225714.

The spelling of 91791480 in words is "ninety-one million, seven hundred ninety-one thousand, four hundred eighty".