28396628 has 24 divisors (see below), whose sum is σ = 55845888. Its totient is φ = 12535776.

The previous prime is 28396619. The next prime is 28396633. The reversal of 28396628 is 82669382.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 10676 + ... + 13067.

It is an arithmetic number, because the mean of its divisors is an integer number (2326912).

Almost surely, 2^28396628 is an apocalyptic number.

It is an amenable number.

28396628 is a deficient number, since it is larger than the sum of its proper divisors (27449260).

28396628 is a wasteful number, since it uses less digits than its factorization.

28396628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23783 (or 23781 counting only the distinct ones).

The product of its digits is 248832, while the sum is 44.

The square root of 28396628 is about 5328.8486561358. The cubic root of 28396628 is about 305.0859848944.

The spelling of 28396628 in words is "twenty-eight million, three hundred ninety-six thousand, six hundred twenty-eight".