78638094 has 32 divisors (see below), whose sum is σ = 176564640. Its totient is φ = 25940736.

The previous prime is 78638057. The next prime is 78638117. The reversal of 78638094 is 49083687.

It is a happy number.

78638094 is a `hidden beast` number, since 7 + 8 + 638 + 0 + 9 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2269 + ... + 12744.

It is an arithmetic number, because the mean of its divisors is an integer number (5517645).

Almost surely, 2^78638094 is an apocalyptic number.

78638094 is an abundant number, since it is smaller than the sum of its proper divisors (97926546).

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

78638094 is a wasteful number, since it uses less digits than its factorization.

78638094 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15121 (or 15115 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 78638094 is about 8867.8122442911. The cubic root of 78638094 is about 428.4278155954.

The spelling of 78638094 in words is "seventy-eight million, six hundred thirty-eight thousand, ninety-four".