399436488 has 384 divisors, whose sum is σ = 1378944000. Its totient is φ = 106444800.

The previous prime is 399436447. The next prime is 399436489. The reversal of 399436488 is 884634993.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (399436489) 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 95 ways as a sum of consecutive naturals, for example, 12885033 + ... + 12885063.

It is an arithmetic number, because the mean of its divisors is an integer number (3591000).

Almost surely, 2^399436488 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 399436488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (689472000).

399436488 is an abundant number, since it is smaller than the sum of its proper divisors (979507512).

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

399436488 is a wasteful number, since it uses less digits than its factorization.

399436488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114 (or 93 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 54.

The square root of 399436488 is about 19985.9072348493. The cubic root of 399436488 is about 736.4601377955.

The spelling of 399436488 in words is "three hundred ninety-nine million, four hundred thirty-six thousand, four hundred eighty-eight".