28002628 has 6 divisors (see below), whose sum is σ = 49004606. Its totient is φ = 14001312.

The previous prime is 28002619. The next prime is 28002629. The reversal of 28002628 is 82620082.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 23020804 + 4981824 = 4798^2 + 2232^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28002596 and 28002605.

It is not an unprimeable number, because it can be changed into a prime (28002629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3500325 + ... + 3500332.

Almost surely, 2^28002628 is an apocalyptic number.

It is an amenable number.

28002628 is a deficient number, since it is larger than the sum of its proper divisors (21001978).

28002628 is a wasteful number, since it uses less digits than its factorization.

28002628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7000661 (or 7000659 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 28002628 is about 5291.7509389615. The cubic root of 28002628 is about 303.6683970759.

The spelling of 28002628 in words is "twenty-eight million, two thousand, six hundred twenty-eight".