7744228 has 6 divisors (see below), whose sum is σ = 13552406. Its totient is φ = 3872112.

The previous prime is 7744223. The next prime is 7744249. The reversal of 7744228 is 8224477.

It can be written as a sum of positive squares in only one way, i.e., 4088484 + 3655744 = 2022^2 + 1912^2 .

It is a super-3 number, since 3×7744228³ (a number of 22 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7744193 and 7744202.

It is not an unprimeable number, because it can be changed into a prime (7744223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 968025 + ... + 968032.

Almost surely, 2^7744228 is an apocalyptic number.

It is an amenable number.

7744228 is a deficient number, since it is larger than the sum of its proper divisors (5808178).

7744228 is a wasteful number, since it uses less digits than its factorization.

7744228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1936061 (or 1936059 counting only the distinct ones).

The product of its digits is 25088, while the sum is 34.

The square root of 7744228 is about 2782.8453065163. The cubic root of 7744228 is about 197.8454393568.

Subtracting 7744228 from its reverse (8224477), we obtain a square (480249 = 693²).

The spelling of 7744228 in words is "seven million, seven hundred forty-four thousand, two hundred twenty-eight".