28556028 has 36 divisors (see below), whose sum is σ = 72578688. Its totient is φ = 9466560.

The previous prime is 28556027. The next prime is 28556081. The reversal of 28556028 is 82065582.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 28555983 and 28556001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28556023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4800 + ... + 8952.

Almost surely, 2^28556028 is an apocalyptic number.

It is an amenable number.

28556028 is an abundant number, since it is smaller than the sum of its proper divisors (44022660).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28556028 is a wasteful number, since it uses less digits than its factorization.

28556028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4354 (or 4349 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The square root of 28556028 is about 5343.7840525231. The cubic root of 28556028 is about 305.6557707987.

The spelling of 28556028 in words is "twenty-eight million, five hundred fifty-six thousand, twenty-eight".