399014440 has 96 divisors (see below), whose sum is σ = 1038996000. Its totient is φ = 137427840.

The previous prime is 399014437. The next prime is 399014461. The reversal of 399014440 is 44410993.

It is a junction number, because it is equal to n+sod(n) for n = 399014396 and 399014405.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 89791 + ... + 94129.

It is an arithmetic number, because the mean of its divisors is an integer number (10822875).

Almost surely, 2^399014440 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 399014440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (519498000).

399014440 is an abundant number, since it is smaller than the sum of its proper divisors (639981560).

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

399014440 is a wasteful number, since it uses less digits than its factorization.

399014440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4391 (or 4376 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 399014440 is about 19975.3458042658. The cubic root of 399014440 is about 736.2006630320.

The spelling of 399014440 in words is "three hundred ninety-nine million, fourteen thousand, four hundred forty".