7912228 has 24 divisors (see below), whose sum is σ = 14345912. Its totient is φ = 3815424.

The previous prime is 7912217. The next prime is 7912237. The reversal of 7912228 is 8222197.

It can be written as a sum of positive squares in 4 ways, for example, as 719104 + 7193124 = 848^2 + 2682^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 7912228.

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, 28426 + ... + 28702.

Almost surely, 2^7912228 is an apocalyptic number.

It is an amenable number.

7912228 is a deficient number, since it is larger than the sum of its proper divisors (6433684).

7912228 is a wasteful number, since it uses less digits than its factorization.

7912228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511 (or 509 counting only the distinct ones).

The product of its digits is 4032, while the sum is 31.

The square root of 7912228 is about 2812.8682869982. The cubic root of 7912228 is about 199.2658752681.

Subtracting from 7912228 its sum of digits (31), we obtain a palindrome (7912197).

The spelling of 7912228 in words is "seven million, nine hundred twelve thousand, two hundred twenty-eight".