28276725 has 24 divisors (see below), whose sum is σ = 47031712. Its totient is φ = 14990400.

The previous prime is 28276723. The next prime is 28276727. The reversal of 28276725 is 52767282.

It is an interprime number because it is at equal distance from previous prime (28276723) and next prime (28276727).

It is not a de Polignac number, because 28276725 - 2¹ = 28276723 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28276723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12534 + ... + 14616.

Almost surely, 2^28276725 is an apocalyptic number.

28276725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28276725 is a deficient number, since it is larger than the sum of its proper divisors (18754987).

28276725 is a wasteful number, since it uses less digits than its factorization.

28276725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2277 (or 2272 counting only the distinct ones).

The product of its digits is 94080, while the sum is 39.

The square root of 28276725 is about 5317.5863885789. The cubic root of 28276725 is about 304.6559768834.

The spelling of 28276725 in words is "twenty-eight million, two hundred seventy-six thousand, seven hundred twenty-five".