28782028 has 18 divisors (see below), whose sum is σ = 55364708. Its totient is φ = 13082520.

The previous prime is 28781971. The next prime is 28782031. The reversal of 28782028 is 82028782.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 29250 + ... + 30217.

Almost surely, 2^28782028 is an apocalyptic number.

It is an amenable number.

28782028 is a deficient number, since it is larger than the sum of its proper divisors (26582680).

28782028 is a wasteful number, since it uses less digits than its factorization.

28782028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59493 (or 59480 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 37.

The square root of 28782028 is about 5364.8884424562. Note that the first 3 decimals coincide. The cubic root of 28782028 is about 306.4599999072.

The spelling of 28782028 in words is "twenty-eight million, seven hundred eighty-two thousand, twenty-eight".