399200155060 has 144 divisors (see below), whose sum is σ = 1002366976464. Its totient is φ = 133060257792.

The previous prime is 399200155033. The next prime is 399200155069. The reversal of 399200155060 is 60551002993.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 5574414244 + 393625740816 = 74662^2 + 627396^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399200155069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 52681992 + ... + 52689568.

It is an arithmetic number, because the mean of its divisors is an integer number (6960881781).

Almost surely, 2^399200155060 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 399200155060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (501183488232).

399200155060 is an abundant number, since it is smaller than the sum of its proper divisors (603166821404).

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

399200155060 is a wasteful number, since it uses less digits than its factorization.

399200155060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9090 (or 9081 counting only the distinct ones).

The product of its (nonzero) digits is 72900, while the sum is 40.

The spelling of 399200155060 in words is "three hundred ninety-nine billion, two hundred million, one hundred fifty-five thousand, sixty".