4428628 has 6 divisors (see below), whose sum is σ = 7750106. Its totient is φ = 2214312.

The previous prime is 4428607. The next prime is 4428643. The reversal of 4428628 is 8268244.

It can be written as a sum of positive squares in only one way, i.e., 4112784 + 315844 = 2028^2 + 562^2 .

It is a super-2 number, since 2×4428628² = 39225491924768, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 4428593 and 4428602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 553575 + ... + 553582.

Almost surely, 2^4428628 is an apocalyptic number.

It is an amenable number.

4428628 is a deficient number, since it is larger than the sum of its proper divisors (3321478).

4428628 is a wasteful number, since it uses less digits than its factorization.

4428628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1107161 (or 1107159 counting only the distinct ones).

The product of its digits is 24576, while the sum is 34.

The square root of 4428628 is about 2104.4305643095. The cubic root of 4428628 is about 164.2188729436.

The spelling of 4428628 in words is "four million, four hundred twenty-eight thousand, six hundred twenty-eight".