399674650 has 12 divisors (see below), whose sum is σ = 743394942. Its totient is φ = 159869840.

The previous prime is 399674647. The next prime is 399674659. The reversal of 399674650 is 56476993.

It can be written as a sum of positive squares in 3 ways, for example, as 372914721 + 26759929 = 19311^2 + 5173^2 .

It is a junction number, because it is equal to n+sod(n) for n = 399674594 and 399674603.

It is not an unprimeable number, because it can be changed into a prime (399674659) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3996697 + ... + 3996796.

Almost surely, 2^399674650 is an apocalyptic number.

399674650 is a deficient number, since it is larger than the sum of its proper divisors (343720292).

399674650 is a wasteful number, since it uses less digits than its factorization.

399674650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7993505 (or 7993500 counting only the distinct ones).

The product of its (nonzero) digits is 1224720, while the sum is 49.

The square root of 399674650 is about 19991.8645953798. The cubic root of 399674650 is about 736.6064789339.

The spelling of 399674650 in words is "three hundred ninety-nine million, six hundred seventy-four thousand, six hundred fifty".