28174628 has 6 divisors (see below), whose sum is σ = 49305606. Its totient is φ = 14087312.

The previous prime is 28174621. The next prime is 28174651. The reversal of 28174628 is 82647182.

It can be written as a sum of positive squares in only one way, i.e., 22829284 + 5345344 = 4778^2 + 2312^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28174591 and 28174600.

It is not an unprimeable number, because it can be changed into a prime (28174621) by changing a digit.

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 as a sum of consecutive naturals, namely, 3521825 + ... + 3521832.

It is an arithmetic number, because the mean of its divisors is an integer number (8217601).

Almost surely, 2^28174628 is an apocalyptic number.

It is an amenable number.

28174628 is a deficient number, since it is larger than the sum of its proper divisors (21130978).

28174628 is a wasteful number, since it uses less digits than its factorization.

28174628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7043661 (or 7043659 counting only the distinct ones).

The product of its digits is 43008, while the sum is 38.

The square root of 28174628 is about 5307.9777693581. The cubic root of 28174628 is about 304.2888672766.

The spelling of 28174628 in words is "twenty-eight million, one hundred seventy-four thousand, six hundred twenty-eight".