398557366596 has 117 divisors (see below), whose sum is σ = 1048634206221. Its totient is φ = 132545636928.

The previous prime is 398557366591. The next prime is 398557366631. The reversal of 398557366596 is 695663755893.

The square root of 398557366596 is 631314.

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

398557366596 is a `hidden beast` number, since 3 + 9 + 8 + 557 + 3 + 6 + 65 + 9 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 44694188100 + 353863178496 = 211410^2 + 594864^2 .

It is not an unprimeable number, because it can be changed into a prime (398557366591) by changing a digit.

It is a polite number, since it can be written in 38 ways as a sum of consecutive naturals, for example, 920455596 + ... + 920456028.

Almost surely, 2^398557366596 is an apocalyptic number.

398557366596 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

398557366596 is the 631314-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 398557366596

398557366596 is an abundant number, since it is smaller than the sum of its proper divisors (650076839625).

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

398557366596 is an frugal number, since it uses more digits than its factorization.

398557366596 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 906 (or 438 counting only the distinct ones).

The product of its digits is 1102248000, while the sum is 72.

It can be divided in two parts, 3985573 and 66596, that added together give a square (4052169 = 2013²).

The spelling of 398557366596 in words is "three hundred ninety-eight billion, five hundred fifty-seven million, three hundred sixty-six thousand, five hundred ninety-six".