654222868 has 18 divisors (see below), whose sum is σ = 1233306186. Its totient is φ = 301863888.

The previous prime is 654222859. The next prime is 654222887. The reversal of 654222868 is 868222456.

It can be written as a sum of positive squares in only one way, i.e., 452923524 + 201299344 = 21282^2 + 14188^2 .

It is a super-2 number, since 2×654222868² = 856015122028290848, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 182671 + ... + 186217.

Almost surely, 2^654222868 is an apocalyptic number.

It is an amenable number.

654222868 is a deficient number, since it is larger than the sum of its proper divisors (579083318).

654222868 is an equidigital number, since it uses as much as digits as its factorization.

654222868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7111 (or 3562 counting only the distinct ones).

The product of its digits is 368640, while the sum is 43.

The square root of 654222868 is about 25577.7807481415. The cubic root of 654222868 is about 868.1109618386.

The spelling of 654222868 in words is "six hundred fifty-four million, two hundred twenty-two thousand, eight hundred sixty-eight".