399705174042 has 32 divisors (see below), whose sum is σ = 802949542080. Its totient is φ = 132646032000.

The previous prime is 399705174031. The next prime is 399705174047. The reversal of 399705174042 is 240471507993.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (399705174047) 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, 1812792 + ... + 2021292.

It is an arithmetic number, because the mean of its divisors is an integer number (25092173190).

Almost surely, 2^399705174042 is an apocalyptic number.

399705174042 is an abundant number, since it is smaller than the sum of its proper divisors (403244368038).

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

399705174042 is a wasteful number, since it uses less digits than its factorization.

399705174042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209918.

The product of its (nonzero) digits is 1905120, while the sum is 51.

The spelling of 399705174042 in words is "three hundred ninety-nine billion, seven hundred five million, one hundred seventy-four thousand, forty-two".