399015330 has 128 divisors (see below), whose sum is σ = 1182988800. Its totient is φ = 85800960.

The previous prime is 399015329. The next prime is 399015349. The reversal of 399015330 is 33510993.

It is a junction number, because it is equal to n+sod(n) for n = 399015291 and 399015300.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 173790 + ... + 176070.

It is an arithmetic number, because the mean of its divisors is an integer number (9242100).

Almost surely, 2^399015330 is an apocalyptic number.

399015330 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 399015330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (591494400).

399015330 is an abundant number, since it is smaller than the sum of its proper divisors (783973470).

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

399015330 is a wasteful number, since it uses less digits than its factorization.

399015330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2329 (or 2315 counting only the distinct ones).

The product of its (nonzero) digits is 10935, while the sum is 33.

The square root of 399015330 is about 19975.3680817150. The cubic root of 399015330 is about 736.2012103957.

The spelling of 399015330 in words is "three hundred ninety-nine million, fifteen thousand, three hundred thirty".