399129236830 has 16 divisors (see below), whose sum is σ = 718441118640. Its totient is φ = 159649807552.

The previous prime is 399129236819. The next prime is 399129236927. The reversal of 399129236830 is 38632921993.

It is a happy number.

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, 923922 + ... + 1285258.

It is an arithmetic number, because the mean of its divisors is an integer number (44902569915).

Almost surely, 2^399129236830 is an apocalyptic number.

399129236830 is a deficient number, since it is larger than the sum of its proper divisors (319311881810).

399129236830 is a wasteful number, since it uses less digits than its factorization.

399129236830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471803.

The product of its (nonzero) digits is 3779136, while the sum is 55.

The spelling of 399129236830 in words is "three hundred ninety-nine billion, one hundred twenty-nine million, two hundred thirty-six thousand, eight hundred thirty".