387857878 has 16 divisors (see below), whose sum is σ = 608426496. Its totient is φ = 185086440.

The previous prime is 387857867. The next prime is 387857881. The reversal of 387857878 is 878758783.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12193 + ... + 30403.

It is an arithmetic number, because the mean of its divisors is an integer number (38026656).

Almost surely, 2^387857878 is an apocalyptic number.

387857878 is a deficient number, since it is larger than the sum of its proper divisors (220568618).

387857878 is a wasteful number, since it uses less digits than its factorization.

387857878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18699.

The product of its digits is 21073920, while the sum is 61.

The square root of 387857878 is about 19694.1076974815. The cubic root of 387857878 is about 729.2742383459.

The spelling of 387857878 in words is "three hundred eighty-seven million, eight hundred fifty-seven thousand, eight hundred seventy-eight".