399252446 has 16 divisors (see below), whose sum is σ = 661677984. Its totient is φ = 179714304.

The previous prime is 399252439. The next prime is 399252449. The reversal of 399252446 is 644252993.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 399252397 and 399252406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399252449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 254495 + ... + 256058.

It is an arithmetic number, because the mean of its divisors is an integer number (41354874).

Almost surely, 2^399252446 is an apocalyptic number.

399252446 is a deficient number, since it is larger than the sum of its proper divisors (262425538).

399252446 is a wasteful number, since it uses less digits than its factorization.

399252446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510595.

The product of its digits is 466560, while the sum is 44.

The square root of 399252446 is about 19981.3024100032. The cubic root of 399252446 is about 736.3470114096.

The spelling of 399252446 in words is "three hundred ninety-nine million, two hundred fifty-two thousand, four hundred forty-six".