78501894 has 24 divisors (see below), whose sum is σ = 158334792. Its totient is φ = 25946880.

The previous prime is 78501877. The next prime is 78501949. The reversal of 78501894 is 49810587.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 325614 + ... + 325854.

It is an arithmetic number, because the mean of its divisors is an integer number (6597283).

Almost surely, 2^78501894 is an apocalyptic number.

78501894 is an abundant number, since it is smaller than the sum of its proper divisors (79832898).

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

78501894 is a wasteful number, since it uses less digits than its factorization.

78501894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712 (or 479 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 42.

The square root of 78501894 is about 8860.1294572935. The cubic root of 78501894 is about 428.1803291413.

The spelling of 78501894 in words is "seventy-eight million, five hundred one thousand, eight hundred ninety-four".