28284251 has 8 divisors (see below), whose sum is σ = 29698320. Its totient is φ = 26899488.

The previous prime is 28284247. The next prime is 28284253. The reversal of 28284251 is 15248282.

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

It is a cyclic number.

It is not a de Polignac number, because 28284251 - 2² = 28284247 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28284253) 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, 5336 + ... + 9221.

It is an arithmetic number, because the mean of its divisors is an integer number (3712290).

Almost surely, 2^28284251 is an apocalyptic number.

28284251 is a deficient number, since it is larger than the sum of its proper divisors (1414069).

28284251 is a wasteful number, since it uses less digits than its factorization.

28284251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14653.

The product of its digits is 10240, while the sum is 32.

The square root of 28284251 is about 5318.2939933780. The cubic root of 28284251 is about 304.6830030859.

The spelling of 28284251 in words is "twenty-eight million, two hundred eighty-four thousand, two hundred fifty-one".