28336257 has 16 divisors (see below), whose sum is σ = 42399360. Its totient is φ = 18702000.

The previous prime is 28336249. The next prime is 28336267. The reversal of 28336257 is 75263382.

28336257 is a `hidden beast` number, since 28 + 3 + 3 + 625 + 7 = 666.

It is not a de Polignac number, because 28336257 - 2³ = 28336249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28336267) 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, 2469 + ... + 7922.

It is an arithmetic number, because the mean of its divisors is an integer number (2649960).

Almost surely, 2^28336257 is an apocalyptic number.

28336257 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

28336257 is a deficient number, since it is larger than the sum of its proper divisors (14063103).

28336257 is a wasteful number, since it uses less digits than its factorization.

28336257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10501 (or 10495 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 28336257 is about 5323.1810978023. The cubic root of 28336257 is about 304.8696280573.

The spelling of 28336257 in words is "twenty-eight million, three hundred thirty-six thousand, two hundred fifty-seven".