28744487 has 2 divisors, whose sum is σ = 28744488. Its totient is φ = 28744486.

The previous prime is 28744459. The next prime is 28744493. The reversal of 28744487 is 78444782.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28744487 - 2⁸ = 28744231 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28744427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14372243 + 14372244.

It is an arithmetic number, because the mean of its divisors is an integer number (14372244).

Almost surely, 2^28744487 is an apocalyptic number.

28744487 is a deficient number, since it is larger than the sum of its proper divisors (1).

28744487 is an equidigital number, since it uses as much as digits as its factorization.

28744487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 401408, while the sum is 44.

The square root of 28744487 is about 5361.3885328336. The cubic root of 28744487 is about 306.3267012104.

The spelling of 28744487 in words is "twenty-eight million, seven hundred forty-four thousand, four hundred eighty-seven".