399142048 has 96 divisors (see below), whose sum is σ = 866121984. Its totient is φ = 180314112.

The previous prime is 399142033. The next prime is 399142067. The reversal of 399142048 is 840241993.

It is a self number, because there is not a number n which added to its sum of digits gives 399142048.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1712940 + ... + 1713172.

It is an arithmetic number, because the mean of its divisors is an integer number (9022104).

Almost surely, 2^399142048 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 399142048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (433060992).

399142048 is an abundant number, since it is smaller than the sum of its proper divisors (466979936).

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

399142048 is a wasteful number, since it uses less digits than its factorization.

399142048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374 (or 366 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 399142048 is about 19978.5396863735. The cubic root of 399142048 is about 736.2791356149.

The spelling of 399142048 in words is "three hundred ninety-nine million, one hundred forty-two thousand, forty-eight".