91838380 has 24 divisors (see below), whose sum is σ = 195505632. Its totient is φ = 36231552.

The previous prime is 91838363. The next prime is 91838413. The reversal of 91838380 is 8383819.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29992 + ... + 32911.

It is an arithmetic number, because the mean of its divisors is an integer number (8146068).

Almost surely, 2^91838380 is an apocalyptic number.

It is an amenable number.

91838380 is an abundant number, since it is smaller than the sum of its proper divisors (103667252).

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

91838380 is a wasteful number, since it uses less digits than its factorization.

91838380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62985 (or 62983 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 91838380 is about 9583.2343183291. The cubic root of 91838380 is about 451.1712369853.

The spelling of 91838380 in words is "ninety-one million, eight hundred thirty-eight thousand, three hundred eighty".