91378752 has 112 divisors (see below), whose sum is σ = 261762240. Its totient is φ = 28035072.

The previous prime is 91378751. The next prime is 91378759. The reversal of 91378752 is 25787319.

It is not an unprimeable number, because it can be changed into a prime (91378751) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134638 + ... + 135314.

Almost surely, 2^91378752 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 91378752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130881120).

91378752 is an abundant number, since it is smaller than the sum of its proper divisors (170383488).

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

91378752 is a wasteful number, since it uses less digits than its factorization.

91378752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748 (or 738 counting only the distinct ones).

The product of its digits is 105840, while the sum is 42.

The square root of 91378752 is about 9559.2233994190. The cubic root of 91378752 is about 450.4173116480.

The spelling of 91378752 in words is "ninety-one million, three hundred seventy-eight thousand, seven hundred fifty-two".