399291481860 has 96 divisors (see below), whose sum is σ = 1124686321920. Its totient is φ = 105844366848.

The previous prime is 399291481837. The next prime is 399291481903. The reversal of 399291481860 is 68184192993.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a junction number, because it is equal to n+sod(n) for n = 399291481794 and 399291481803.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6798942 + ... + 6857418.

It is an arithmetic number, because the mean of its divisors is an integer number (11715482520).

Almost surely, 2^399291481860 is an apocalyptic number.

399291481860 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

399291481860 is an abundant number, since it is smaller than the sum of its proper divisors (725394840060).

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

399291481860 is a wasteful number, since it uses less digits than its factorization.

399291481860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59165 (or 59163 counting only the distinct ones).

The product of its (nonzero) digits is 6718464, while the sum is 60.

The spelling of 399291481860 in words is "three hundred ninety-nine billion, two hundred ninety-one million, four hundred eighty-one thousand, eight hundred sixty".