28002245 has 16 divisors (see below), whose sum is σ = 34668480. Its totient is φ = 21700224.

The previous prime is 28002241. The next prime is 28002263. The reversal of 28002245 is 54220082.

It is a cyclic number.

It is not a de Polignac number, because 28002245 - 2² = 28002241 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28002245.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28002241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29417 + ... + 30353.

It is an arithmetic number, because the mean of its divisors is an integer number (2166780).

Almost surely, 2^28002245 is an apocalyptic number.

It is an amenable number.

28002245 is a deficient number, since it is larger than the sum of its proper divisors (6666235).

28002245 is a wasteful number, since it uses less digits than its factorization.

28002245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1124.

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 28002245 is about 5291.7147504377. The cubic root of 28002245 is about 303.6670126162.

The spelling of 28002245 in words is "twenty-eight million, two thousand, two hundred forty-five".