399241140856 has 64 divisors (see below), whose sum is σ = 827755200000. Its totient is φ = 179677593216.

The previous prime is 399241140853. The next prime is 399241140869. The reversal of 399241140856 is 658041142993.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399241140853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137685 + ... + 904123.

It is an arithmetic number, because the mean of its divisors is an integer number (12933675000).

Almost surely, 2^399241140856 is an apocalyptic number.

It is an amenable number.

399241140856 is an abundant number, since it is smaller than the sum of its proper divisors (428514059144).

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

399241140856 is a wasteful number, since it uses less digits than its factorization.

399241140856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 766636 (or 766632 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 52.

The spelling of 399241140856 in words is "three hundred ninety-nine billion, two hundred forty-one million, one hundred forty thousand, eight hundred fifty-six".