28005028 has 24 divisors (see below), whose sum is σ = 50803200. Its totient is φ = 13493760.

The previous prime is 28005023. The next prime is 28005073. The reversal of 28005028 is 82050082.

It is a junction number, because it is equal to n+sod(n) for n = 28004993 and 28005011.

It is not an unprimeable number, because it can be changed into a prime (28005023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55425 + ... + 55927.

It is an arithmetic number, because the mean of its divisors is an integer number (2116800).

Almost surely, 2^28005028 is an apocalyptic number.

It is an amenable number.

28005028 is a deficient number, since it is larger than the sum of its proper divisors (22798172).

28005028 is a wasteful number, since it uses less digits than its factorization.

28005028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987 (or 985 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 28005028 is about 5291.9777021450. The cubic root of 28005028 is about 303.6770722537.

The spelling of 28005028 in words is "twenty-eight million, five thousand, twenty-eight".