399108340 has 24 divisors (see below), whose sum is σ = 838549152. Its totient is φ = 159563040.

The previous prime is 399108331. The next prime is 399108361. The reversal of 399108340 is 43801993.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 399108340.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50967 + ... + 58273.

It is an arithmetic number, because the mean of its divisors is an integer number (34939548).

Almost surely, 2^399108340 is an apocalyptic number.

It is an amenable number.

399108340 is an abundant number, since it is smaller than the sum of its proper divisors (439440812).

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

399108340 is a wasteful number, since it uses less digits than its factorization.

399108340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10047 (or 10045 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 399108340 is about 19977.6960633603. The cubic root of 399108340 is about 736.2584084946.

The spelling of 399108340 in words is "three hundred ninety-nine million, one hundred eight thousand, three hundred forty".