28251763 has 4 divisors (see below), whose sum is σ = 28297168. Its totient is φ = 28206360.

The previous prime is 28251733. The next prime is 28251781. The reversal of 28251763 is 36715282.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28251763 is a prime.

It is a super-2 number, since 2×28251763² = 1596324225216338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28251733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21756 + ... + 23017.

It is an arithmetic number, because the mean of its divisors is an integer number (7074292).

Almost surely, 2^28251763 is an apocalyptic number.

28251763 is a deficient number, since it is larger than the sum of its proper divisors (45405).

28251763 is an equidigital number, since it uses as much as digits as its factorization.

28251763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45404.

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

The square root of 28251763 is about 5315.2387528690. The cubic root of 28251763 is about 304.5663028802.

The spelling of 28251763 in words is "twenty-eight million, two hundred fifty-one thousand, seven hundred sixty-three".