398492455117 has 8 divisors (see below), whose sum is σ = 400327700600. Its totient is φ = 396660063744.

The previous prime is 398492455103. The next prime is 398492455129. The reversal of 398492455117 is 711554294893.

It can be written as a sum of positive squares in 4 ways, for example, as 7193414596 + 391299040521 = 84814^2 + 625539^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 398492455117 - 2²³ = 398484066509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398492455817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 433392 + ... + 992377.

It is an arithmetic number, because the mean of its divisors is an integer number (50040962575).

Almost surely, 2^398492455117 is an apocalyptic number.

It is an amenable number.

398492455117 is a deficient number, since it is larger than the sum of its proper divisors (1835245483).

398492455117 is a wasteful number, since it uses less digits than its factorization.

398492455117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1427055.

The product of its digits is 10886400, while the sum is 58.

The spelling of 398492455117 in words is "three hundred ninety-eight billion, four hundred ninety-two million, four hundred fifty-five thousand, one hundred seventeen".