399414406 has 4 divisors (see below), whose sum is σ = 599121612. Its totient is φ = 199707202.

The previous prime is 399414347. The next prime is 399414443. The reversal of 399414406 is 604414993.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99853600 + ... + 99853603.

It is an arithmetic number, because the mean of its divisors is an integer number (149780403).

Almost surely, 2^399414406 is an apocalyptic number.

399414406 is a deficient number, since it is larger than the sum of its proper divisors (199707206).

399414406 is a wasteful number, since it uses less digits than its factorization.

399414406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199707205.

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 399414406 is about 19985.3547879441. The cubic root of 399414406 is about 736.4465663326.

The spelling of 399414406 in words is "three hundred ninety-nine million, four hundred fourteen thousand, four hundred six".