399571652 has 24 divisors (see below), whose sum is σ = 726212256. Its totient is φ = 192221568.

The previous prime is 399571649. The next prime is 399571673. The reversal of 399571652 is 256175993.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 399571597 and 399571606.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5813 + ... + 28860.

It is an arithmetic number, because the mean of its divisors is an integer number (30258844).

Almost surely, 2^399571652 is an apocalyptic number.

It is an amenable number.

399571652 is a deficient number, since it is larger than the sum of its proper divisors (326640604).

399571652 is a wasteful number, since it uses less digits than its factorization.

399571652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34787 (or 34785 counting only the distinct ones).

The product of its digits is 510300, while the sum is 47.

The square root of 399571652 is about 19989.2884315575. The cubic root of 399571652 is about 736.5431978690.

The spelling of 399571652 in words is "three hundred ninety-nine million, five hundred seventy-one thousand, six hundred fifty-two".