2787223656 has 32 divisors (see below), whose sum is σ = 7963496640. Its totient is φ = 796349568.

The previous prime is 2787223643. The next prime is 2787223667. The reversal of 2787223656 is 6563227872.

It is a happy number.

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, 8295141 + ... + 8295476.

It is an arithmetic number, because the mean of its divisors is an integer number (248859270).

Almost surely, 2^2787223656 is an apocalyptic number.

It is an amenable number.

2787223656 is an abundant number, since it is smaller than the sum of its proper divisors (5176272984).

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

2787223656 is a wasteful number, since it uses less digits than its factorization.

2787223656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16590633 (or 16590629 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 48.

The square root of 2787223656 is about 52794.1630864625. The cubic root of 2787223656 is about 1407.3126985707.

The spelling of 2787223656 in words is "two billion, seven hundred eighty-seven million, two hundred twenty-three thousand, six hundred fifty-six".