91236656 has 40 divisors (see below), whose sum is σ = 205463040. Its totient is φ = 38435904.

The previous prime is 91236643. The next prime is 91236667. The reversal of 91236656 is 65663219.

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, 296 + ... + 13511.

It is an arithmetic number, because the mean of its divisors is an integer number (5136576).

Almost surely, 2^91236656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91236656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102731520).

91236656 is an abundant number, since it is smaller than the sum of its proper divisors (114226384).

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

91236656 is a wasteful number, since it uses less digits than its factorization.

91236656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13881 (or 13875 counting only the distinct ones).

The product of its digits is 58320, while the sum is 38.

The square root of 91236656 is about 9551.7881048524. The cubic root of 91236656 is about 450.1837208671.

The spelling of 91236656 in words is "ninety-one million, two hundred thirty-six thousand, six hundred fifty-six".