91632786 has 64 divisors (see below), whose sum is σ = 216760320. Its totient is φ = 25280640.

The previous prime is 91632731. The next prime is 91632787. The reversal of 91632786 is 68723619.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (91632787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 218485 + ... + 218903.

It is an arithmetic number, because the mean of its divisors is an integer number (3386880).

Almost surely, 2^91632786 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91632786, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108380160).

91632786 is an abundant number, since it is smaller than the sum of its proper divisors (125127534).

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

91632786 is a wasteful number, since it uses less digits than its factorization.

91632786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599.

The product of its digits is 108864, while the sum is 42.

The square root of 91632786 is about 9572.5015539304. The cubic root of 91632786 is about 450.8343139286.

The spelling of 91632786 in words is "ninety-one million, six hundred thirty-two thousand, seven hundred eighty-six".