399237120 has 336 divisors, whose sum is σ = 1498061520. Its totient is φ = 100859904.

The previous prime is 399237119. The next prime is 399237133. The reversal of 399237120 is 21732993.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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, 21012471 + ... + 21012489.

Almost surely, 2^399237120 is an apocalyptic number.

399237120 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 399237120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (749030760).

399237120 is an abundant number, since it is smaller than the sum of its proper divisors (1098824400).

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

399237120 is an equidigital number, since it uses as much as digits as its factorization.

399237120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78 (or 29 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 36.

The square root of 399237120 is about 19980.9188977885. The cubic root of 399237120 is about 736.3375893019.

The spelling of 399237120 in words is "three hundred ninety-nine million, two hundred thirty-seven thousand, one hundred twenty".