28453251 has 8 divisors (see below), whose sum is σ = 38286160. Its totient is φ = 18794592.

The previous prime is 28453237. The next prime is 28453273. The reversal of 28453251 is 15235482.

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

It is not a de Polignac number, because 28453251 - 2⁷ = 28453123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28453151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43180 + ... + 43833.

It is an arithmetic number, because the mean of its divisors is an integer number (4785770).

Almost surely, 2^28453251 is an apocalyptic number.

28453251 is a deficient number, since it is larger than the sum of its proper divisors (9832909).

28453251 is a wasteful number, since it uses less digits than its factorization.

28453251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87125.

The product of its digits is 9600, while the sum is 30.

The square root of 28453251 is about 5334.1588840229. The cubic root of 28453251 is about 305.2886311894.

It can be divided in two parts, 284 and 53251, that added together give a palindrome (53535).

The spelling of 28453251 in words is "twenty-eight million, four hundred fifty-three thousand, two hundred fifty-one".