91938740 has 24 divisors (see below), whose sum is σ = 195955872. Its totient is φ = 36226080.

The previous prime is 91938733. The next prime is 91938779. The reversal of 91938740 is 4783919.

It is a happy number.

It is a congruent number.

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, 32966 + ... + 35645.

It is an arithmetic number, because the mean of its divisors is an integer number (8164828).

Almost surely, 2^91938740 is an apocalyptic number.

It is an amenable number.

91938740 is an abundant number, since it is smaller than the sum of its proper divisors (104017132).

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

91938740 is a wasteful number, since it uses less digits than its factorization.

91938740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68687 (or 68685 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 91938740 is about 9588.4691166004. The cubic root of 91938740 is about 451.3355221919.

The spelling of 91938740 in words is "ninety-one million, nine hundred thirty-eight thousand, seven hundred forty".