398924931005 has 8 divisors (see below), whose sum is σ = 478731655512. Its totient is φ = 319125452608.

The previous prime is 398924930977. The next prime is 398924931017. The reversal of 398924931005 is 500139429893.

It can be written as a sum of positive squares in 4 ways, for example, as 61386008644 + 337538922361 = 247762^2 + 580981^2 .

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 398924931005 - 2¹⁸ = 398924668861 is a prime.

It is a super-2 number, since 2×398924931005² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1689662 + ... + 1911231.

It is an arithmetic number, because the mean of its divisors is an integer number (59841456939).

Almost surely, 2^398924931005 is an apocalyptic number.

It is an amenable number.

398924931005 is a deficient number, since it is larger than the sum of its proper divisors (79806724507).

398924931005 is a wasteful number, since it uses less digits than its factorization.

398924931005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3623055.

The product of its (nonzero) digits is 2099520, while the sum is 53.

The spelling of 398924931005 in words is "three hundred ninety-eight billion, nine hundred twenty-four million, nine hundred thirty-one thousand, five".