28287334451 has 4 divisors (see below), whose sum is σ = 28287939504. Its totient is φ = 28286729400.

The previous prime is 28287334333. The next prime is 28287334469. The reversal of 28287334451 is 15443378282.

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

It is a cyclic number.

It is not a de Polignac number, because 28287334451 - 2²² = 28283140147 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28287334396 and 28287334405.

It is not an unprimeable number, because it can be changed into a prime (28287334051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 225935 + ... + 328056.

It is an arithmetic number, because the mean of its divisors is an integer number (7071984876).

Almost surely, 2^28287334451 is an apocalyptic number.

28287334451 is a deficient number, since it is larger than the sum of its proper divisors (605053).

28287334451 is an equidigital number, since it uses as much as digits as its factorization.

28287334451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605052.

The product of its digits is 1290240, while the sum is 47.

The spelling of 28287334451 in words is "twenty-eight billion, two hundred eighty-seven million, three hundred thirty-four thousand, four hundred fifty-one".