28653251 has 8 divisors (see below), whose sum is σ = 31309824. Its totient is φ = 26005320.

The previous prime is 28653241. The next prime is 28653253. The reversal of 28653251 is 15235682.

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

It is not a de Polignac number, because 28653251 - 2¹⁸ = 28391107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28653253) 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, 6206 + ... + 9788.

It is an arithmetic number, because the mean of its divisors is an integer number (3913728).

Almost surely, 2^28653251 is an apocalyptic number.

28653251 is a deficient number, since it is larger than the sum of its proper divisors (2656573).

28653251 is a wasteful number, since it uses less digits than its factorization.

28653251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4321.

The product of its digits is 14400, while the sum is 32.

The square root of 28653251 is about 5352.8731537372. The cubic root of 28653251 is about 306.0022605099.

Subtracting from 28653251 its reverse (15235682), we obtain a square (13417569 = 3663²).

It can be divided in two parts, 2865 and 3251, that added together give a palindrome (6116).

The spelling of 28653251 in words is "twenty-eight million, six hundred fifty-three thousand, two hundred fifty-one".