398420019844 has 24 divisors (see below), whose sum is σ = 869280043968. Its totient is φ = 155228579040.

The previous prime is 398420019841. The next prime is 398420019913. The reversal of 398420019844 is 448910024893.

It is a junction number, because it is equal to n+sod(n) for n = 398420019791 and 398420019800.

It is not an unprimeable number, because it can be changed into a prime (398420019841) 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, 646785439 + ... + 646786054.

It is an arithmetic number, because the mean of its divisors is an integer number (36220001832).

Almost surely, 2^398420019844 is an apocalyptic number.

It is an amenable number.

398420019844 is an abundant number, since it is smaller than the sum of its proper divisors (470860024124).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

398420019844 is a wasteful number, since it uses less digits than its factorization.

398420019844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1293571515 (or 1293571513 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 52.

The spelling of 398420019844 in words is "three hundred ninety-eight billion, four hundred twenty million, nineteen thousand, eight hundred forty-four".