2238581668 has 24 divisors (see below), whose sum is σ = 3965788512. Its totient is φ = 1105561344.

The previous prime is 2238581647. The next prime is 2238581687. The reversal of 2238581668 is 8661858322.

It is a super-2 number, since 2×2238581668² = 10022495768611324448, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140980 + ... + 156052.

It is an arithmetic number, because the mean of its divisors is an integer number (165241188).

Almost surely, 2^2238581668 is an apocalyptic number.

It is an amenable number.

2238581668 is a deficient number, since it is larger than the sum of its proper divisors (1727206844).

2238581668 is a wasteful number, since it uses less digits than its factorization.

2238581668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15531 (or 15529 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 49.

The square root of 2238581668 is about 47313.6520256046. The cubic root of 2238581668 is about 1308.1503075530.

The spelling of 2238581668 in words is "two billion, two hundred thirty-eight million, five hundred eighty-one thousand, six hundred sixty-eight".