91738368 has 108 divisors (see below), whose sum is σ = 273824460. Its totient is φ = 29503488.

The previous prime is 91738303. The next prime is 91738379. The reversal of 91738368 is 86383719.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 75481344 + 16257024 = 8688^2 + 4032^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66130 + ... + 67502.

Almost surely, 2^91738368 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 91738368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136912230).

91738368 is an abundant number, since it is smaller than the sum of its proper divisors (182086092).

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

91738368 is a wasteful number, since it uses less digits than its factorization.

91738368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1424 (or 1407 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 91738368 is about 9578.0148256306. The cubic root of 91738368 is about 451.0074023331.

The spelling of 91738368 in words is "ninety-one million, seven hundred thirty-eight thousand, three hundred sixty-eight".