91778832 has 100 divisors (see below), whose sum is σ = 277273920. Its totient is φ = 29253312.

The previous prime is 91778821. The next prime is 91778837. The reversal of 91778832 is 23887719.

It is not an unprimeable number, because it can be changed into a prime (91778837) 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 19 ways as a sum of consecutive naturals, for example, 28269 + ... + 31347.

Almost surely, 2^91778832 is an apocalyptic number.

91778832 is a gapful number since it is divisible by the number (92) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91778832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138636960).

91778832 is an abundant number, since it is smaller than the sum of its proper divisors (185495088).

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

91778832 is a wasteful number, since it uses less digits than its factorization.

91778832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3122 (or 3107 counting only the distinct ones).

The product of its digits is 169344, while the sum is 45.

The square root of 91778832 is about 9580.1269302656. The cubic root of 91778832 is about 451.0737027677.

The spelling of 91778832 in words is "ninety-one million, seven hundred seventy-eight thousand, eight hundred thirty-two".