28338255 has 40 divisors (see below), whose sum is σ = 55425744. Its totient is φ = 13737600.

The previous prime is 28338251. The next prime is 28338281. The reversal of 28338255 is 55283382.

It is not a de Polignac number, because 28338255 - 2² = 28338251 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28338251) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1275 + ... + 7635.

Almost surely, 2^28338255 is an apocalyptic number.

28338255 is a deficient number, since it is larger than the sum of its proper divisors (27087489).

28338255 is a wasteful number, since it uses less digits than its factorization.

28338255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6389 (or 6380 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

The square root of 28338255 is about 5323.3687642319. The cubic root of 28338255 is about 304.8767933792.

The spelling of 28338255 in words is "twenty-eight million, three hundred thirty-eight thousand, two hundred fifty-five".