28295251 has 8 divisors (see below), whose sum is σ = 28685664. Its totient is φ = 27907200.

The previous prime is 28295231. The next prime is 28295261. The reversal of 28295251 is 15259282.

It is a happy number.

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 28295251 - 2¹³ = 28287059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28295231) 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, 43410 + ... + 44056.

It is an arithmetic number, because the mean of its divisors is an integer number (3585708).

Almost surely, 2^28295251 is an apocalyptic number.

28295251 is a deficient number, since it is larger than the sum of its proper divisors (390413).

28295251 is a wasteful number, since it uses less digits than its factorization.

28295251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1181.

The product of its digits is 14400, while the sum is 34.

The square root of 28295251 is about 5319.3280590691. The cubic root of 28295251 is about 304.7224959548.

The spelling of 28295251 in words is "twenty-eight million, two hundred ninety-five thousand, two hundred fifty-one".