91073472 has 56 divisors (see below), whose sum is σ = 275392896. Its totient is φ = 26020608.

The previous prime is 91073467. The next prime is 91073497. The reversal of 91073472 is 27437019.

It is a tau number, because it is divible by the number of its divisors (56).

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, 32538 + ... + 35225.

Almost surely, 2^91073472 is an apocalyptic number.

It is an amenable number.

91073472 is an abundant number, since it is smaller than the sum of its proper divisors (184319424).

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

91073472 is a wasteful number, since it uses less digits than its factorization.

91073472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67785 (or 67775 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 33.

The square root of 91073472 is about 9543.2422163539. The cubic root of 91073472 is about 449.9151642544.

The spelling of 91073472 in words is "ninety-one million, seventy-three thousand, four hundred seventy-two".