28776028 has 12 divisors (see below), whose sum is σ = 50726592. Its totient is φ = 14282720.

The previous prime is 28776023. The next prime is 28776043. The reversal of 28776028 is 82067782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28776023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25708 + ... + 26803.

It is an arithmetic number, because the mean of its divisors is an integer number (4227216).

Almost surely, 2^28776028 is an apocalyptic number.

It is an amenable number.

28776028 is a deficient number, since it is larger than the sum of its proper divisors (21950564).

28776028 is a wasteful number, since it uses less digits than its factorization.

28776028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52652 (or 52650 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 40.

The square root of 28776028 is about 5364.3292218133. The cubic root of 28776028 is about 306.4387031941.

The spelling of 28776028 in words is "twenty-eight million, seven hundred seventy-six thousand, twenty-eight".