28638295 has 24 divisors (see below), whose sum is σ = 40966128. Its totient is φ = 19152000.

The previous prime is 28638293. The next prime is 28638299. The reversal of 28638295 is 59283682.

It is not a de Polignac number, because 28638295 - 2¹ = 28638293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28638293) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8620 + ... + 11470.

It is an arithmetic number, because the mean of its divisors is an integer number (1706922).

Almost surely, 2^28638295 is an apocalyptic number.

28638295 is a deficient number, since it is larger than the sum of its proper divisors (12327833).

28638295 is a wasteful number, since it uses less digits than its factorization.

28638295 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2911 (or 2904 counting only the distinct ones).

The product of its digits is 207360, while the sum is 43.

The square root of 28638295 is about 5351.4759646288. The cubic root of 28638295 is about 305.9490103998.

The spelling of 28638295 in words is "twenty-eight million, six hundred thirty-eight thousand, two hundred ninety-five".