398439934892 has 24 divisors (see below), whose sum is σ = 699604940160. Its totient is φ = 198553857920.

The previous prime is 398439934877. The next prime is 398439934909. The reversal of 398439934892 is 298439934893.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1396592 + ... + 1657512.

It is an arithmetic number, because the mean of its divisors is an integer number (29150205840).

Almost surely, 2^398439934892 is an apocalyptic number.

It is an amenable number.

398439934892 is a deficient number, since it is larger than the sum of its proper divisors (301165005268).

398439934892 is a wasteful number, since it uses less digits than its factorization.

398439934892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262201 (or 262199 counting only the distinct ones).

The product of its digits is 362797056, while the sum is 71.

Subtracting from 398439934892 its reverse (298439934893), we obtain a palindrome (99999999999).

It can be divided in two parts, 398439 and 934892, that added together give a palindrome (1333331).

The spelling of 398439934892 in words is "three hundred ninety-eight billion, four hundred thirty-nine million, nine hundred thirty-four thousand, eight hundred ninety-two".