28367251 has 8 divisors (see below), whose sum is σ = 31104000. Its totient is φ = 25656840.

The previous prime is 28367239. The next prime is 28367281. The reversal of 28367251 is 15276382.

It is a happy number.

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

It is not a de Polignac number, because 28367251 - 2⁵ = 28367219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28367281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4291 + ... + 8668.

It is an arithmetic number, because the mean of its divisors is an integer number (3888000).

Almost surely, 2^28367251 is an apocalyptic number.

28367251 is a deficient number, since it is larger than the sum of its proper divisors (2736749).

28367251 is a wasteful number, since it uses less digits than its factorization.

28367251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13169.

The product of its digits is 20160, while the sum is 34.

The square root of 28367251 is about 5326.0915313201. The cubic root of 28367251 is about 304.9807423118.

The spelling of 28367251 in words is "twenty-eight million, three hundred sixty-seven thousand, two hundred fifty-one".