399508752552 has 384 divisors, whose sum is σ = 1333383690240. Its totient is φ = 98525306880.

The previous prime is 399508752547. The next prime is 399508752553. The reversal of 399508752552 is 255257805993.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (399508752553) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 40798777 + ... + 40808567.

It is an arithmetic number, because the mean of its divisors is an integer number (3472353360).

Almost surely, 2^399508752552 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 399508752552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (666691845120).

399508752552 is an abundant number, since it is smaller than the sum of its proper divisors (933874937688).

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

399508752552 is a wasteful number, since it uses less digits than its factorization.

399508752552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10001 (or 9990 counting only the distinct ones).

The product of its (nonzero) digits is 34020000, while the sum is 60.

The spelling of 399508752552 in words is "three hundred ninety-nine billion, five hundred eight million, seven hundred fifty-two thousand, five hundred fifty-two".