865222772 has 24 divisors (see below), whose sum is σ = 1616885760. Its totient is φ = 404218080.

The previous prime is 865222751. The next prime is 865222777. The reversal of 865222772 is 277222568.

It is a happy number.

It is a super-2 number, since 2×865222772² = 1497220890374727968, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865222777) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116708 + ... + 123899.

It is an arithmetic number, because the mean of its divisors is an integer number (67370240).

Almost surely, 2^865222772 is an apocalyptic number.

It is an amenable number.

865222772 is a deficient number, since it is larger than the sum of its proper divisors (751662988).

865222772 is a wasteful number, since it uses less digits than its factorization.

865222772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240671 (or 240669 counting only the distinct ones).

The product of its digits is 188160, while the sum is 41.

The square root of 865222772 is about 29414.6693335145. The cubic root of 865222772 is about 952.8897317829.

The spelling of 865222772 in words is "eight hundred sixty-five million, two hundred twenty-two thousand, seven hundred seventy-two".