399198628 has 6 divisors (see below), whose sum is σ = 698597606. Its totient is φ = 199599312.

The previous prime is 399198599. The next prime is 399198677. The reversal of 399198628 is 826891993.

It can be written as a sum of positive squares in only one way, i.e., 249576804 + 149621824 = 15798^2 + 12232^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49899825 + ... + 49899832.

Almost surely, 2^399198628 is an apocalyptic number.

It is an amenable number.

399198628 is a deficient number, since it is larger than the sum of its proper divisors (299398978).

399198628 is a wasteful number, since it uses less digits than its factorization.

399198628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99799661 (or 99799659 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 55.

The square root of 399198628 is about 19979.9556556064. The cubic root of 399198628 is about 736.3139241532.

The spelling of 399198628 in words is "three hundred ninety-nine million, one hundred ninety-eight thousand, six hundred twenty-eight".