28005025300 has 72 divisors (see below), whose sum is σ = 73107890240. Its totient is φ = 9096364800.

The previous prime is 28005025271. The next prime is 28005025309. The reversal of 28005025300 is 352050082.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28005025309) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1039521 + ... + 1066120.

Almost surely, 2^28005025300 is an apocalyptic number.

28005025300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28005025300 is an abundant number, since it is smaller than the sum of its proper divisors (45102864940).

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

28005025300 is a wasteful number, since it uses less digits than its factorization.

28005025300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2105681 (or 2105674 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 28005025300 its reverse (352050082), we get a palindrome (28357075382).

The spelling of 28005025300 in words is "twenty-eight billion, five million, twenty-five thousand, three hundred".