399335935488 has 320 divisors, whose sum is σ = 1260401472000. Its totient is φ = 109930512384.

The previous prime is 399335935487. The next prime is 399335935489. The reversal of 399335935488 is 884539533993.

It is an interprime number because it is at equal distance from previous prime (399335935487) and next prime (399335935489).

It is a super-3 number, since 3×399335935488³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399335935487) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 193008118 + ... + 193010186.

It is an arithmetic number, because the mean of its divisors is an integer number (3938754600).

Almost surely, 2^399335935488 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 399335935488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (630200736000).

399335935488 is an abundant number, since it is smaller than the sum of its proper divisors (861065536512).

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

399335935488 is a wasteful number, since it uses less digits than its factorization.

399335935488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2745 (or 2729 counting only the distinct ones).

The product of its digits is 377913600, while the sum is 69.

The spelling of 399335935488 in words is "three hundred ninety-nine billion, three hundred thirty-five million, nine hundred thirty-five thousand, four hundred eighty-eight".