399814394 has 8 divisors (see below), whose sum is σ = 685396128. Its totient is φ = 171349020.

The previous prime is 399814391. The next prime is 399814399. The reversal of 399814394 is 493418993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (399814391) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 14279072 + ... + 14279099.

It is an arithmetic number, because the mean of its divisors is an integer number (85674516).

Almost surely, 2^399814394 is an apocalyptic number.

399814394 is a deficient number, since it is larger than the sum of its proper divisors (285581734).

399814394 is a wasteful number, since it uses less digits than its factorization.

399814394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28558180.

The product of its digits is 839808, while the sum is 50.

The square root of 399814394 is about 19995.3593116003. The cubic root of 399814394 is about 736.6923190383.

The spelling of 399814394 in words is "three hundred ninety-nine million, eight hundred fourteen thousand, three hundred ninety-four".