28234257 has 8 divisors (see below), whose sum is σ = 38011584. Its totient is φ = 18639888.

The previous prime is 28234231. The next prime is 28234267. The reversal of 28234257 is 75243282.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28234257 - 2¹² = 28230161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28234267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45378 + ... + 45995.

It is an arithmetic number, because the mean of its divisors is an integer number (4751448).

Almost surely, 2^28234257 is an apocalyptic number.

It is an amenable number.

28234257 is a deficient number, since it is larger than the sum of its proper divisors (9777327).

28234257 is a wasteful number, since it uses less digits than its factorization.

28234257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91479.

The product of its digits is 26880, while the sum is 33.

The square root of 28234257 is about 5313.5917231191. The cubic root of 28234257 is about 304.5033824490.

The spelling of 28234257 in words is "twenty-eight million, two hundred thirty-four thousand, two hundred fifty-seven".