78957878 has 8 divisors (see below), whose sum is σ = 118486800. Its totient is φ = 39462280.

The previous prime is 78957829. The next prime is 78957913. The reversal of 78957878 is 87875987.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1178 + ... + 12621.

It is an arithmetic number, because the mean of its divisors is an integer number (14810850).

Almost surely, 2^78957878 is an apocalyptic number.

78957878 is a deficient number, since it is larger than the sum of its proper divisors (39528922).

78957878 is a wasteful number, since it uses less digits than its factorization.

78957878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16662.

The product of its digits is 7902720, while the sum is 59.

The square root of 78957878 is about 8885.8245537485. The cubic root of 78957878 is about 429.0077680559.

The spelling of 78957878 in words is "seventy-eight million, nine hundred fifty-seven thousand, eight hundred seventy-eight".