28330251 has 8 divisors (see below), whose sum is σ = 37853184. Its totient is φ = 18847080.

The previous prime is 28330243. The next prime is 28330261. The reversal of 28330251 is 15203382.

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

It is not a de Polignac number, because 28330251 - 2³ = 28330243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28330201) 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, 8235 + ... + 11156.

It is an arithmetic number, because the mean of its divisors is an integer number (4731648).

Almost surely, 2^28330251 is an apocalyptic number.

28330251 is a deficient number, since it is larger than the sum of its proper divisors (9522933).

28330251 is a wasteful number, since it uses less digits than its factorization.

28330251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19881.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 28330251 is about 5322.6169315479. The cubic root of 28330251 is about 304.8480870287.

The spelling of 28330251 in words is "twenty-eight million, three hundred thirty thousand, two hundred fifty-one".