398827486918 has 16 divisors (see below), whose sum is σ = 683713672704. Its totient is φ = 170923713480.

The previous prime is 398827486913. The next prime is 398827486943. The reversal of 398827486918 is 819684728893.

It is a super-2 number, since 2×398827486918² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398827486913) 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, 1200771 + ... + 1496497.

It is an arithmetic number, because the mean of its divisors is an integer number (42732104544).

Almost surely, 2^398827486918 is an apocalyptic number.

398827486918 is a deficient number, since it is larger than the sum of its proper divisors (284886185786).

398827486918 is a wasteful number, since it uses less digits than its factorization.

398827486918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392067.

The product of its digits is 334430208, while the sum is 73.

The spelling of 398827486918 in words is "three hundred ninety-eight billion, eight hundred twenty-seven million, four hundred eighty-six thousand, nine hundred eighteen".