399677434 has 8 divisors (see below), whose sum is σ = 645632820. Its totient is φ = 184466496.

The previous prime is 399677419. The next prime is 399677459. The reversal of 399677434 is 434776993.

It can be written as a sum of positive squares in 2 ways, for example, as 391921209 + 7756225 = 19797^2 + 2785^2 .

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

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 3 ways as a sum of consecutive naturals, for example, 7686079 + ... + 7686130.

Almost surely, 2^399677434 is an apocalyptic number.

399677434 is a deficient number, since it is larger than the sum of its proper divisors (245955386).

399677434 is a wasteful number, since it uses less digits than its factorization.

399677434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15372224.

The product of its digits is 3429216, while the sum is 52.

The square root of 399677434 is about 19991.9342235813. The cubic root of 399677434 is about 736.6081892480.

The spelling of 399677434 in words is "three hundred ninety-nine million, six hundred seventy-seven thousand, four hundred thirty-four".