28774451 has 2 divisors, whose sum is σ = 28774452. Its totient is φ = 28774450.

The previous prime is 28774441. The next prime is 28774453. The reversal of 28774451 is 15447782.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28774451 - 2¹⁰ = 28773427 is a prime.

Together with 28774453, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28774453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14387225 + 14387226.

It is an arithmetic number, because the mean of its divisors is an integer number (14387226).

Almost surely, 2^28774451 is an apocalyptic number.

28774451 is a deficient number, since it is larger than the sum of its proper divisors (1).

28774451 is an equidigital number, since it uses as much as digits as its factorization.

28774451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62720, while the sum is 38.

The square root of 28774451 is about 5364.1822303125. The cubic root of 28774451 is about 306.4331052167.

The spelling of 28774451 in words is "twenty-eight million, seven hundred seventy-four thousand, four hundred fifty-one".