399047616 has 84 divisors (see below), whose sum is σ = 1247799384. Its totient is φ = 120921600.

The previous prime is 399047587. The next prime is 399047617. The reversal of 399047616 is 616740993.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399047617) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25155 + ... + 37826.

Almost surely, 2^399047616 is an apocalyptic number.

399047616 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

399047616 is an abundant number, since it is smaller than the sum of its proper divisors (848751768).

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

399047616 is a wasteful number, since it uses less digits than its factorization.

399047616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63010 (or 62997 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 399047616 is about 19976.1762106766. The cubic root of 399047616 is about 736.2210662337.

The spelling of 399047616 in words is "three hundred ninety-nine million, forty-seven thousand, six hundred sixteen".