91338440 has 32 divisors (see below), whose sum is σ = 207092160. Its totient is φ = 36254400.

The previous prime is 91338427. The next prime is 91338469. The reversal of 91338440 is 4483319.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 91338397 and 91338406.

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, 3476 + ... + 13955.

It is an arithmetic number, because the mean of its divisors is an integer number (6471630).

Almost surely, 2^91338440 is an apocalyptic number.

It is an amenable number.

91338440 is an abundant number, since it is smaller than the sum of its proper divisors (115753720).

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

91338440 is a wasteful number, since it uses less digits than its factorization.

91338440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17573 (or 17569 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 91338440 is about 9557.1146273339. The cubic root of 91338440 is about 450.3510676071.

The spelling of 91338440 in words is "ninety-one million, three hundred thirty-eight thousand, four hundred forty".