28249245 has 24 divisors (see below), whose sum is σ = 49360896. Its totient is φ = 14944608.

The previous prime is 28249229. The next prime is 28249253. The reversal of 28249245 is 54294282.

It is not a de Polignac number, because 28249245 - 2⁴ = 28249229 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3244 + ... + 8186.

It is an arithmetic number, because the mean of its divisors is an integer number (2056704).

Almost surely, 2^28249245 is an apocalyptic number.

It is an amenable number.

28249245 is a deficient number, since it is larger than the sum of its proper divisors (21111651).

28249245 is a wasteful number, since it uses less digits than its factorization.

28249245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5081 (or 5078 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 28249245 is about 5315.0018814672. The cubic root of 28249245 is about 304.5572542327.

The spelling of 28249245 in words is "twenty-eight million, two hundred forty-nine thousand, two hundred forty-five".