91942378 has 16 divisors (see below), whose sum is σ = 151214400. Its totient is φ = 41580000.

The previous prime is 91942369. The next prime is 91942381. The reversal of 91942378 is 87324919.

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, 6123 + ... + 14878.

It is an arithmetic number, because the mean of its divisors is an integer number (9450900).

Almost surely, 2^91942378 is an apocalyptic number.

91942378 is a deficient number, since it is larger than the sum of its proper divisors (59272022).

91942378 is a wasteful number, since it uses less digits than its factorization.

91942378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21213.

The product of its digits is 108864, while the sum is 43.

The square root of 91942378 is about 9588.6588217540. The cubic root of 91942378 is about 451.3414752028.

The spelling of 91942378 in words is "ninety-one million, nine hundred forty-two thousand, three hundred seventy-eight".