28285451 has 2 divisors, whose sum is σ = 28285452. Its totient is φ = 28285450.

The previous prime is 28285417. The next prime is 28285459. The reversal of 28285451 is 15458282.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28285451 - 2¹⁴ = 28269067 is a prime.

It is a Chen prime.

It is equal to p_1758095 and since 28285451 and 1758095 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (28285459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14142725 + 14142726.

It is an arithmetic number, because the mean of its divisors is an integer number (14142726).

Almost surely, 2^28285451 is an apocalyptic number.

28285451 is a deficient number, since it is larger than the sum of its proper divisors (1).

28285451 is an equidigital number, since it uses as much as digits as its factorization.

28285451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25600, while the sum is 35.

The square root of 28285451 is about 5318.4068103145. The cubic root of 28285451 is about 304.6873118964.

The spelling of 28285451 in words is "twenty-eight million, two hundred eighty-five thousand, four hundred fifty-one".