78989194 has 16 divisors (see below), whose sum is σ = 127622880. Its totient is φ = 36545040.

The previous prime is 78989179. The next prime is 78989227. The reversal of 78989194 is 49198987.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22537 + ... + 25804.

It is an arithmetic number, because the mean of its divisors is an integer number (7976430).

Almost surely, 2^78989194 is an apocalyptic number.

78989194 is a deficient number, since it is larger than the sum of its proper divisors (48633686).

78989194 is a wasteful number, since it uses less digits than its factorization.

78989194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48405.

The product of its digits is 1306368, while the sum is 55.

The square root of 78989194 is about 8887.5865115339. The cubic root of 78989194 is about 429.0644777508.

The spelling of 78989194 in words is "seventy-eight million, nine hundred eighty-nine thousand, one hundred ninety-four".