393539939870 has 128 divisors (see below), whose sum is σ = 931053699072. Its totient is φ = 116178998400.

The previous prime is 393539939861. The next prime is 393539939911. The reversal of 393539939870 is 78939935393.

It is a self number, because there is not a number n which added to its sum of digits gives 393539939870.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 946499 + ... + 1297281.

It is an arithmetic number, because the mean of its divisors is an integer number (7273857024).

Almost surely, 2^393539939870 is an apocalyptic number.

393539939870 is an abundant number, since it is smaller than the sum of its proper divisors (537513759202).

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

393539939870 is a wasteful number, since it uses less digits than its factorization.

393539939870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350886.

The product of its (nonzero) digits is 148803480, while the sum is 68.

The spelling of 393539939870 in words is "three hundred ninety-three billion, five hundred thirty-nine million, nine hundred thirty-nine thousand, eight hundred seventy".