91538268 has 48 divisors (see below), whose sum is σ = 233966880. Its totient is φ = 27725824.

The previous prime is 91538243. The next prime is 91538347. The reversal of 91538268 is 86283519.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1821 + ... + 13652.

It is an arithmetic number, because the mean of its divisors is an integer number (4874310).

Almost surely, 2^91538268 is an apocalyptic number.

It is an amenable number.

91538268 is an abundant number, since it is smaller than the sum of its proper divisors (142428612).

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

91538268 is a wasteful number, since it uses less digits than its factorization.

91538268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15526 (or 15524 counting only the distinct ones).

The product of its digits is 103680, while the sum is 42.

The square root of 91538268 is about 9567.5633261557. The cubic root of 91538268 is about 450.6792507350.

It can be divided in two parts, 91538 and 268, that added together give a triangular number (91806 = T₄₂₈).

The spelling of 91538268 in words is "ninety-one million, five hundred thirty-eight thousand, two hundred sixty-eight".