399129236886 has 32 divisors (see below), whose sum is σ = 861688316160. Its totient is φ = 122870368544.

The previous prime is 399129236819. The next prime is 399129236927. The reversal of 399129236886 is 688632921993.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49862220 + ... + 49870223.

It is an arithmetic number, because the mean of its divisors is an integer number (26927759880).

Almost surely, 2^399129236886 is an apocalyptic number.

399129236886 is an abundant number, since it is smaller than the sum of its proper divisors (462559079274).

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

399129236886 is a wasteful number, since it uses less digits than its factorization.

399129236886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99732500.

The product of its digits is 60466176, while the sum is 66.

The spelling of 399129236886 in words is "three hundred ninety-nine billion, one hundred twenty-nine million, two hundred thirty-six thousand, eight hundred eighty-six".