399292136980 has 96 divisors (see below), whose sum is σ = 923942194560. Its totient is φ = 143742144000.

The previous prime is 399292136977. The next prime is 399292137061. The reversal of 399292136980 is 89631292993.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 12116766 + ... + 12149674.

It is an arithmetic number, because the mean of its divisors is an integer number (9624397860).

Almost surely, 2^399292136980 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 399292136980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (461971097280).

399292136980 is an abundant number, since it is smaller than the sum of its proper divisors (524650057580).

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

399292136980 is a wasteful number, since it uses less digits than its factorization.

399292136980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33481 (or 33479 counting only the distinct ones).

The product of its (nonzero) digits is 11337408, while the sum is 61.

The spelling of 399292136980 in words is "three hundred ninety-nine billion, two hundred ninety-two million, one hundred thirty-six thousand, nine hundred eighty".