422072831538 has 30 divisors (see below), whose sum is σ = 945774318159. Its totient is φ = 140688187524.

The previous prime is 422072831527. The next prime is 422072831569. The reversal of 422072831538 is 835138270224.

422072831538 is a `hidden beast` number, since 42 + 2 + 0 + 72 + 8 + 3 + 1 + 538 = 666.

It can be written as a sum of positive squares in only one way, i.e., 211036415769 + 211036415769 = 459387^2 + 459387^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=459387.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 422072831493 and 422072831502.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 8243445 + ... + 8294487.

Almost surely, 2^422072831538 is an apocalyptic number.

422072831538 is an abundant number, since it is smaller than the sum of its proper divisors (523701486621).

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

422072831538 is an frugal number, since it uses more digits than its factorization.

422072831538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102100 (or 51048 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The spelling of 422072831538 in words is "four hundred twenty-two billion, seventy-two million, eight hundred thirty-one thousand, five hundred thirty-eight".