28364028 has 48 divisors (see below), whose sum is σ = 82516224. Its totient is φ = 7367040.

The previous prime is 28364027. The next prime is 28364071. The reversal of 28364028 is 82046382.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a self number, because there is not a number n which added to its sum of digits gives 28364028.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28364023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14425 + ... + 16272.

It is an arithmetic number, because the mean of its divisors is an integer number (1719088).

Almost surely, 2^28364028 is an apocalyptic number.

28364028 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28364028 is an abundant number, since it is smaller than the sum of its proper divisors (54152196).

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

28364028 is a wasteful number, since it uses less digits than its factorization.

28364028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30722 (or 30720 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 28364028 is about 5325.7889556384. The cubic root of 28364028 is about 304.9691915490.

The spelling of 28364028 in words is "twenty-eight million, three hundred sixty-four thousand, twenty-eight".