399849768 has 24 divisors (see below), whose sum is σ = 1082926650. Its totient is φ = 133283232.

The previous prime is 399849719. The next prime is 399849833. The reversal of 399849768 is 867948993.

It can be written as a sum of positive squares in only one way, i.e., 328987044 + 70862724 = 18138^2 + 8418^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2776663 + ... + 2776806.

Almost surely, 2^399849768 is an apocalyptic number.

It is an amenable number.

399849768 is an abundant number, since it is smaller than the sum of its proper divisors (683076882).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

399849768 is a wasteful number, since it uses less digits than its factorization.

399849768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5553481 (or 5553474 counting only the distinct ones).

The product of its digits is 23514624, while the sum is 63.

The square root of 399849768 is about 19996.2438472829. The cubic root of 399849768 is about 736.7140449407.

The spelling of 399849768 in words is "three hundred ninety-nine million, eight hundred forty-nine thousand, seven hundred sixty-eight".