398022020008 has 8 divisors (see below), whose sum is σ = 746291287530. Its totient is φ = 199011010000.

The previous prime is 398022019981. The next prime is 398022020009. The reversal of 398022020008 is 800020220893.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 377509478724 + 20512541284 = 614418^2 + 143222^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×398022020008² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (398022020009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24876376243 + ... + 24876376258.

Almost surely, 2^398022020008 is an apocalyptic number.

It is an amenable number.

398022020008 is a deficient number, since it is larger than the sum of its proper divisors (348269267522).

398022020008 is a wasteful number, since it uses less digits than its factorization.

398022020008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49752752507 (or 49752752503 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The spelling of 398022020008 in words is "three hundred ninety-eight billion, twenty-two million, twenty thousand, eight".