91072032 has 48 divisors (see below), whose sum is σ = 239555232. Its totient is φ = 30295040.

The previous prime is 91072027. The next prime is 91072049. The reversal of 91072032 is 23027019.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 91071993 and 91072011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92728 + ... + 93704.

It is an arithmetic number, because the mean of its divisors is an integer number (4990734).

Almost surely, 2^91072032 is an apocalyptic number.

It is an amenable number.

91072032 is an abundant number, since it is smaller than the sum of its proper divisors (148483200).

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

91072032 is a wasteful number, since it uses less digits than its factorization.

91072032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1961 (or 1953 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 91072032 is about 9543.1667699983. The cubic root of 91072032 is about 449.9127929775.

The spelling of 91072032 in words is "ninety-one million, seventy-two thousand, thirty-two".