78857356 has 48 divisors (see below), whose sum is σ = 151351200. Its totient is φ = 35804160.

The previous prime is 78857347. The next prime is 78857371. The reversal of 78857356 is 65375887.

Its product of digits (1411200) is a multiple of the sum of its prime divisors (392).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 435586 + ... + 435766.

It is an arithmetic number, because the mean of its divisors is an integer number (3153150).

Almost surely, 2^78857356 is an apocalyptic number.

It is an amenable number.

78857356 is a deficient number, since it is larger than the sum of its proper divisors (72493844).

78857356 is a wasteful number, since it uses less digits than its factorization.

78857356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394 (or 392 counting only the distinct ones).

The product of its digits is 1411200, while the sum is 49.

The square root of 78857356 is about 8880.1664398816. The cubic root of 78857356 is about 428.8256328309.

The spelling of 78857356 in words is "seventy-eight million, eight hundred fifty-seven thousand, three hundred fifty-six".