399265954842 has 32 divisors (see below), whose sum is σ = 818805182400. Its totient is φ = 129748389120.

The previous prime is 399265954823. The next prime is 399265954847. The reversal of 399265954842 is 248459562993.

It is a Smith number, since the sum of its digits (66) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (399265954847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4785592 + ... + 4868307.

It is an arithmetic number, because the mean of its divisors is an integer number (25587661950).

Almost surely, 2^399265954842 is an apocalyptic number.

399265954842 is an abundant number, since it is smaller than the sum of its proper divisors (419539227558).

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

399265954842 is a wasteful number, since it uses less digits than its factorization.

399265954842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9654078.

The product of its digits is 167961600, while the sum is 66.

The spelling of 399265954842 in words is "three hundred ninety-nine billion, two hundred sixty-five million, nine hundred fifty-four thousand, eight hundred forty-two".