399270032 has 60 divisors (see below), whose sum is σ = 902442240. Its totient is φ = 170630208.

The previous prime is 399270023. The next prime is 399270043. The reversal of 399270032 is 230072993.

It is a junction number, because it is equal to n+sod(n) for n = 399269974 and 399270001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 475469 + ... + 476307.

It is an arithmetic number, because the mean of its divisors is an integer number (15040704).

Almost surely, 2^399270032 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 399270032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (451221120).

399270032 is an abundant number, since it is smaller than the sum of its proper divisors (503172208).

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

399270032 is a wasteful number, since it uses less digits than its factorization.

399270032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1468 (or 1455 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 35.

The square root of 399270032 is about 19981.7424665618. The cubic root of 399270032 is about 736.3578226216.

The spelling of 399270032 in words is "three hundred ninety-nine million, two hundred seventy thousand, thirty-two".