91072956 has 24 divisors (see below), whose sum is σ = 228850384. Its totient is φ = 28022400.

The previous prime is 91072951. The next prime is 91072967. The reversal of 91072956 is 65927019.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91072951) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 291745 + ... + 292056.

Almost surely, 2^91072956 is an apocalyptic number.

It is an amenable number.

91072956 is an abundant number, since it is smaller than the sum of its proper divisors (137777428).

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

91072956 is a wasteful number, since it uses less digits than its factorization.

91072956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583821 (or 583819 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 39.

The square root of 91072956 is about 9543.2151814784. The cubic root of 91072956 is about 449.9143145497.

The spelling of 91072956 in words is "ninety-one million, seventy-two thousand, nine hundred fifty-six".