91816452 has 72 divisors (see below), whose sum is σ = 285661376. Its totient is φ = 24214464.

The previous prime is 91816447. The next prime is 91816453. The reversal of 91816452 is 25461819.

91816452 is a `hidden beast` number, since 9 + 1 + 8 + 1 + 645 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (91816453) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10738 + ... + 17289.

Almost surely, 2^91816452 is an apocalyptic number.

It is an amenable number.

91816452 is an abundant number, since it is smaller than the sum of its proper divisors (193844924).

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

91816452 is a wasteful number, since it uses less digits than its factorization.

91816452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28057 (or 28052 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 91816452 is about 9582.0901686427. The cubic root of 91816452 is about 451.1353258177.

The spelling of 91816452 in words is "ninety-one million, eight hundred sixteen thousand, four hundred fifty-two".