22398707858 has 18 divisors (see below), whose sum is σ = 33979149333. Its totient is φ = 11073737280.

The previous prime is 22398707839. The next prime is 22398707899. The reversal of 22398707858 is 85870789322.

It can be written as a sum of positive squares in 2 ways, for example, as 22340384089 + 58323769 = 149467^2 + 7637^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=105827.

It is a super-2 number, since 2×22398707858² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22398707797 and 22398707806.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 20529893 + ... + 20530983.

Almost surely, 2^22398707858 is an apocalyptic number.

22398707858 is a deficient number, since it is larger than the sum of its proper divisors (11580441475).

22398707858 is an frugal number, since it uses more digits than its factorization.

22398707858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2378 (or 1190 counting only the distinct ones).

The product of its (nonzero) digits is 13547520, while the sum is 59.

The spelling of 22398707858 in words is "twenty-two billion, three hundred ninety-eight million, seven hundred seven thousand, eight hundred fifty-eight".