399833917632 has 112 divisors (see below), whose sum is σ = 1178461346400. Its totient is φ = 132935132160.

The previous prime is 399833917631. The next prime is 399833917667. The reversal of 399833917632 is 236719338993.

It is a self number, because there is not a number n which added to its sum of digits gives 399833917632.

It is not an unprimeable number, because it can be changed into a prime (399833917631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 374782 + ... + 969602.

Almost surely, 2^399833917632 is an apocalyptic number.

399833917632 is a gapful number since it is divisible by the number (32) 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 399833917632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (589230673200).

399833917632 is an abundant number, since it is smaller than the sum of its proper divisors (778627428768).

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

399833917632 is a wasteful number, since it uses less digits than its factorization.

399833917632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 595231 (or 595215 counting only the distinct ones).

The product of its digits is 39680928, while the sum is 63.

The spelling of 399833917632 in words is "three hundred ninety-nine billion, eight hundred thirty-three million, nine hundred seventeen thousand, six hundred thirty-two".