399511552 has 52 divisors (see below), whose sum is σ = 871653456. Its totient is φ = 181575680.

The previous prime is 399511547. The next prime is 399511561. The reversal of 399511552 is 255115993.

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, 40623 + ... + 49489.

Almost surely, 2^399511552 is an apocalyptic number.

399511552 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 399511552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (435826728).

399511552 is an abundant number, since it is smaller than the sum of its proper divisors (472141904).

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

399511552 is an equidigital number, since it uses as much as digits as its factorization.

399511552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8902 (or 8880 counting only the distinct ones).

The product of its digits is 60750, while the sum is 40.

The square root of 399511552 is about 19987.7850698871. The cubic root of 399511552 is about 736.5062679337.

The spelling of 399511552 in words is "three hundred ninety-nine million, five hundred eleven thousand, five hundred fifty-two".