28025300 has 18 divisors (see below), whose sum is σ = 60815118. Its totient is φ = 11210080.

The previous prime is 28025297. The next prime is 28025303. The reversal of 28025300 is 352082.

It is an interprime number because it is at equal distance from previous prime (28025297) and next prime (28025303).

It can be written as a sum of positive squares in 3 ways, for example, as 6160324 + 21864976 = 2482^2 + 4676^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28025303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 140027 + ... + 140226.

Almost surely, 2^28025300 is an apocalyptic number.

28025300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28025300 is an abundant number, since it is smaller than the sum of its proper divisors (32789818).

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

28025300 is a wasteful number, since it uses less digits than its factorization.

28025300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280267 (or 280260 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 28025300 is about 5293.8927076396. The cubic root of 28025300 is about 303.7503288226.

Adding to 28025300 its reverse (352082), we get a palindrome (28377382).

The spelling of 28025300 in words is "twenty-eight million, twenty-five thousand, three hundred".