28025253 has 6 divisors (see below), whose sum is σ = 40480934. Its totient is φ = 18683496.

The previous prime is 28025237. The next prime is 28025267. The reversal of 28025253 is 35252082.

It can be written as a sum of positive squares in only one way, i.e., 14607684 + 13417569 = 3822^2 + 3663^2 .

It is not a de Polignac number, because 28025253 - 2⁴ = 28025237 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 (28025203) 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, 1556950 + ... + 1556967.

Almost surely, 2^28025253 is an apocalyptic number.

It is an amenable number.

28025253 is a deficient number, since it is larger than the sum of its proper divisors (12455681).

28025253 is a wasteful number, since it uses less digits than its factorization.

28025253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3113923 (or 3113920 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 28025253 is about 5293.8882685603. Note that the first 3 decimals coincide. The cubic root of 28025253 is about 303.7501590204.

It can be divided in two parts, 2802525 and 3, that added together give a triangular number (2802528 = T₂₃₆₇).

The spelling of 28025253 in words is "twenty-eight million, twenty-five thousand, two hundred fifty-three".