2208640772 has 24 divisors (see below), whose sum is σ = 4166569176. Its totient is φ = 1018361088.

The previous prime is 2208640727. The next prime is 2208640789. The reversal of 2208640772 is 2770468022.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 692005636 + 1516635136 = 26306^2 + 38944^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33158 + ... + 74274.

It is an arithmetic number, because the mean of its divisors is an integer number (173607049).

Almost surely, 2^2208640772 is an apocalyptic number.

It is an amenable number.

2208640772 is a deficient number, since it is larger than the sum of its proper divisors (1957928404).

2208640772 is a wasteful number, since it uses less digits than its factorization.

2208640772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42167 (or 42165 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 38.

The square root of 2208640772 is about 46996.1782701530. The cubic root of 2208640772 is about 1302.2919670256.

The spelling of 2208640772 in words is "two billion, two hundred eight million, six hundred forty thousand, seven hundred seventy-two".