396222678818 has 6 divisors (see below), whose sum is σ = 594335353521. Its totient is φ = 198110894312.

The previous prime is 396222678809. The next prime is 396222678821. The reversal of 396222678818 is 818876222693.

It can be written as a sum of positive squares in 2 ways, for example, as 314201728369 + 82020950449 = 560537^2 + 286393^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=445097.

It is a super-2 number, since 2×396222678818² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 667646 + ... + 1112742.

Almost surely, 2^396222678818 is an apocalyptic number.

396222678818 is a deficient number, since it is larger than the sum of its proper divisors (198112674703).

396222678818 is an frugal number, since it uses more digits than its factorization.

396222678818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 890196 (or 445099 counting only the distinct ones).

The product of its digits is 27869184, while the sum is 62.

The spelling of 396222678818 in words is "three hundred ninety-six billion, two hundred twenty-two million, six hundred seventy-eight thousand, eight hundred eighteen".