398022020020 has 24 divisors (see below), whose sum is σ = 836032463784. Its totient is φ = 159173337216.

The previous prime is 398022020009. The next prime is 398022020069. The reversal of 398022020020 is 20020220893.

It can be written as a sum of positive squares in 4 ways, for example, as 273376305316 + 124645714704 = 522854^2 + 353052^2 .

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, 2124819 + ... + 2304538.

It is an arithmetic number, because the mean of its divisors is an integer number (34834685991).

Almost surely, 2^398022020020 is an apocalyptic number.

It is an amenable number.

398022020020 is an abundant number, since it is smaller than the sum of its proper divisors (438010443764).

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

398022020020 is a wasteful number, since it uses less digits than its factorization.

398022020020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4433859 (or 4433857 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The spelling of 398022020020 in words is "three hundred ninety-eight billion, twenty-two million, twenty thousand, twenty".