399392105706 has 48 divisors (see below), whose sum is σ = 949291630560. Its totient is φ = 120351766560.

The previous prime is 399392105687. The next prime is 399392105741. The reversal of 399392105706 is 607501293993.

It is a happy number.

399392105706 is a `hidden beast` number, since 39 + 9 + 39 + 2 + 1 + 0 + 570 + 6 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5599005 + ... + 5669888.

It is an arithmetic number, because the mean of its divisors is an integer number (19776908970).

Almost surely, 2^399392105706 is an apocalyptic number.

399392105706 is an abundant number, since it is smaller than the sum of its proper divisors (549899524854).

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

399392105706 is a wasteful number, since it uses less digits than its factorization.

399392105706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11269091 (or 11269088 counting only the distinct ones).

The product of its (nonzero) digits is 2755620, while the sum is 54.

The spelling of 399392105706 in words is "three hundred ninety-nine billion, three hundred ninety-two million, one hundred five thousand, seven hundred six".