399372288 has 104 divisors (see below), whose sum is σ = 1217248128. Its totient is φ = 114081792.

The previous prime is 399372283. The next prime is 399372319. The reversal of 399372288 is 882273993.

It is a happy number.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 399372288.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399372283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83695 + ... + 88337.

Almost surely, 2^399372288 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 399372288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (608624064).

399372288 is an abundant number, since it is smaller than the sum of its proper divisors (817875840).

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

399372288 is an equidigital number, since it uses as much as digits as its factorization.

399372288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4677 (or 4655 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 51.

The square root of 399372288 is about 19984.3010385652. The cubic root of 399372288 is about 736.4206794790.

The spelling of 399372288 in words is "three hundred ninety-nine million, three hundred seventy-two thousand, two hundred eighty-eight".