399343934934 has 96 divisors (see below), whose sum is σ = 1072556686656. Its totient is φ = 104767395840.

The previous prime is 399343934929. The next prime is 399343934939. The reversal of 399343934934 is 439439343993.

It is an interprime number because it is at equal distance from previous prime (399343934929) and next prime (399343934939).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399343934939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2185777 + ... + 2361420.

It is an arithmetic number, because the mean of its divisors is an integer number (11172465486).

Almost surely, 2^399343934934 is an apocalyptic number.

399343934934 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

399343934934 is an abundant number, since it is smaller than the sum of its proper divisors (673212751722).

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

399343934934 is a wasteful number, since it uses less digits than its factorization.

399343934934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4547270 (or 4547267 counting only the distinct ones).

The product of its digits is 102036672, while the sum is 63.

The spelling of 399343934934 in words is "three hundred ninety-nine billion, three hundred forty-three million, nine hundred thirty-four thousand, nine hundred thirty-four".