399307104 has 192 divisors, whose sum is σ = 1346042880. Its totient is φ = 112803840.

The previous prime is 399307093. The next prime is 399307123. The reversal of 399307104 is 401703993.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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, 622624 + ... + 623264.

It is an arithmetic number, because the mean of its divisors is an integer number (7010640).

Almost surely, 2^399307104 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 399307104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (673021440).

399307104 is an abundant number, since it is smaller than the sum of its proper divisors (946735776).

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

399307104 is a wasteful number, since it uses less digits than its factorization.

399307104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 770 (or 756 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 36.

The square root of 399307104 is about 19982.6700918571. The cubic root of 399307104 is about 736.3806120541.

The spelling of 399307104 in words is "three hundred ninety-nine million, three hundred seven thousand, one hundred four".