398436039824 has 20 divisors (see below), whose sum is σ = 772697447100. Its totient is φ = 199030247040.

The previous prime is 398436039811. The next prime is 398436039889. The reversal of 398436039824 is 428930634893.

It can be written as a sum of positive squares in 2 ways, for example, as 237500275600 + 160935764224 = 487340^2 + 401168^2 .

It is a super-2 number, since 2×398436039824² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11718299 + ... + 11752250.

It is an arithmetic number, because the mean of its divisors is an integer number (38634872355).

Almost surely, 2^398436039824 is an apocalyptic number.

It is an amenable number.

398436039824 is a deficient number, since it is larger than the sum of its proper divisors (374261407276).

398436039824 is a wasteful number, since it uses less digits than its factorization.

398436039824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23471618 (or 23471612 counting only the distinct ones).

The product of its (nonzero) digits is 26873856, while the sum is 59.

The spelling of 398436039824 in words is "three hundred ninety-eight billion, four hundred thirty-six million, thirty-nine thousand, eight hundred twenty-four".