399369330 has 48 divisors (see below), whose sum is σ = 1045272384. Its totient is φ = 105789600.

The previous prime is 399369329. The next prime is 399369331. The reversal of 399369330 is 33963993.

It is an interprime number because it is at equal distance from previous prime (399369329) and next prime (399369331).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (399369331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1104 + ... + 28283.

It is an arithmetic number, because the mean of its divisors is an integer number (21776508).

Almost surely, 2^399369330 is an apocalyptic number.

399369330 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 399369330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (522636192).

399369330 is an abundant number, since it is smaller than the sum of its proper divisors (645903054).

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

399369330 is a wasteful number, since it uses less digits than its factorization.

399369330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29551 (or 29548 counting only the distinct ones).

The product of its (nonzero) digits is 354294, while the sum is 45.

The square root of 399369330 is about 19984.2270303357. The cubic root of 399369330 is about 736.4188613443.

The spelling of 399369330 in words is "three hundred ninety-nine million, three hundred sixty-nine thousand, three hundred thirty".