399047759232 has 128 divisors (see below), whose sum is σ = 1094690764800. Its totient is φ = 128722513920.

The previous prime is 399047759197. The next prime is 399047759239. The reversal of 399047759232 is 232957740993.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×399047759232² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399047759239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1482057 + ... + 1730487.

It is an arithmetic number, because the mean of its divisors is an integer number (8552271600).

Almost surely, 2^399047759232 is an apocalyptic number.

399047759232 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 399047759232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (547345382400).

399047759232 is an abundant number, since it is smaller than the sum of its proper divisors (695643005568).

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

399047759232 is a wasteful number, since it uses less digits than its factorization.

399047759232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248584 (or 248572 counting only the distinct ones).

The product of its (nonzero) digits is 25719120, while the sum is 60.

The spelling of 399047759232 in words is "three hundred ninety-nine billion, forty-seven million, seven hundred fifty-nine thousand, two hundred thirty-two".