399957586084 has 81 divisors (see below), whose sum is σ = 821932162443. Its totient is φ = 169797717936.

The previous prime is 399957586081. The next prime is 399957586087. The reversal of 399957586084 is 480685759993.

The square root of 399957586084 is 632422.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (399957586081) and next prime (399957586087).

It is a super-3 number, since 3×399957586084³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 399957585998 and 399957586016.

It is not an unprimeable number, because it can be changed into a prime (399957586081) 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 26 ways as a sum of consecutive naturals, for example, 1761927579 + ... + 1761927805.

Almost surely, 2^399957586084 is an apocalyptic number.

399957586084 is the 632422-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 399957586084

399957586084 is an abundant number, since it is smaller than the sum of its proper divisors (421974576359).

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

399957586084 is an equidigital number, since it uses as much as digits as its factorization.

399957586084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870 (or 435 counting only the distinct ones).

The product of its (nonzero) digits is 587865600, while the sum is 73.

The spelling of 399957586084 in words is "three hundred ninety-nine billion, nine hundred fifty-seven million, five hundred eighty-six thousand, eighty-four".