28010025 has 18 divisors (see below), whose sum is σ = 50169470. Its totient is φ = 14938560.

The previous prime is 28009981. The next prime is 28010053. The reversal of 28010025 is 52001082.

It can be written as a sum of positive squares in 3 ways, for example, as 4761 + 28005264 = 69^2 + 5292^2 .

It is not a de Polignac number, because 28010025 - 2⁸ = 28009769 is a prime.

It is a Curzon number.

It is an unprimeable number.

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 17 ways as a sum of consecutive naturals, for example, 62020 + ... + 62469.

Almost surely, 2^28010025 is an apocalyptic number.

28010025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28010025 is a deficient number, since it is larger than the sum of its proper divisors (22159445).

28010025 is a wasteful number, since it uses less digits than its factorization.

28010025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124505 (or 124497 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 28010025 is about 5292.4498108154. The cubic root of 28010025 is about 303.6951331067.

The spelling of 28010025 in words is "twenty-eight million, ten thousand, twenty-five".