28438245 has 48 divisors (see below), whose sum is σ = 54580032. Its totient is φ = 13582080.

The previous prime is 28438213. The next prime is 28438247. The reversal of 28438245 is 54283482.

It is not a de Polignac number, because 28438245 - 2⁵ = 28438213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28438247) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 35742 + ... + 36528.

It is an arithmetic number, because the mean of its divisors is an integer number (1137084).

Almost surely, 2^28438245 is an apocalyptic number.

It is an amenable number.

28438245 is a deficient number, since it is larger than the sum of its proper divisors (26141787).

28438245 is a wasteful number, since it uses less digits than its factorization.

28438245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 882 (or 879 counting only the distinct ones).

The product of its digits is 61440, while the sum is 36.

The square root of 28438245 is about 5332.7521037453. The cubic root of 28438245 is about 305.2349528851.

The spelling of 28438245 in words is "twenty-eight million, four hundred thirty-eight thousand, two hundred forty-five".