399113744 has 20 divisors (see below), whose sum is σ = 787874796. Its totient is φ = 195791232.

The previous prime is 399113731. The next prime is 399113761. The reversal of 399113744 is 447311993.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 196336144 + 202777600 = 14012^2 + 14240^2 .

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234479 + ... + 236174.

Almost surely, 2^399113744 is an apocalyptic number.

It is an amenable number.

399113744 is a deficient number, since it is larger than the sum of its proper divisors (388761052).

399113744 is a wasteful number, since it uses less digits than its factorization.

399113744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470714 (or 470708 counting only the distinct ones).

The product of its digits is 81648, while the sum is 41.

The square root of 399113744 is about 19977.8313137337. The cubic root of 399113744 is about 736.2617315041.

The spelling of 399113744 in words is "three hundred ninety-nine million, one hundred thirteen thousand, seven hundred forty-four".