399199658704 has 80 divisors (see below), whose sum is σ = 965058232320. Its totient is φ = 155410116480.

The previous prime is 399199658657. The next prime is 399199658731. The reversal of 399199658704 is 407856991993.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1449057 + ... + 1702399.

It is an arithmetic number, because the mean of its divisors is an integer number (12063227904).

Almost surely, 2^399199658704 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 399199658704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (482529116160).

399199658704 is an abundant number, since it is smaller than the sum of its proper divisors (565858573616).

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

399199658704 is a wasteful number, since it uses less digits than its factorization.

399199658704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254648 (or 254642 counting only the distinct ones).

The product of its (nonzero) digits is 132269760, while the sum is 70.

The spelling of 399199658704 in words is "three hundred ninety-nine billion, one hundred ninety-nine million, six hundred fifty-eight thousand, seven hundred four".