399252447 has 36 divisors (see below), whose sum is σ = 636009192. Its totient is φ = 241164000.

The previous prime is 399252439. The next prime is 399252449. The reversal of 399252447 is 744252993.

399252447 is a `hidden beast` number, since 39 + 92 + 524 + 4 + 7 = 666.

It is not a de Polignac number, because 399252447 - 2³ = 399252439 is a prime.

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 pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 569197 + ... + 569897.

It is an arithmetic number, because the mean of its divisors is an integer number (17666922).

Almost surely, 2^399252447 is an apocalyptic number.

399252447 is a deficient number, since it is larger than the sum of its proper divisors (236756745).

399252447 is a wasteful number, since it uses less digits than its factorization.

399252447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1252 (or 1238 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The square root of 399252447 is about 19981.3024350266. The cubic root of 399252447 is about 736.3470120244.

The spelling of 399252447 in words is "three hundred ninety-nine million, two hundred fifty-two thousand, four hundred forty-seven".