28747387 has 2 divisors, whose sum is σ = 28747388. Its totient is φ = 28747386.

The previous prime is 28747379. The next prime is 28747417. The reversal of 28747387 is 78374782.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28747387 - 2³ = 28747379 is a prime.

It is not a weakly prime, because it can be changed into another prime (28747487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14373693 + 14373694.

It is an arithmetic number, because the mean of its divisors is an integer number (14373694).

Almost surely, 2^28747387 is an apocalyptic number.

28747387 is a deficient number, since it is larger than the sum of its proper divisors (1).

28747387 is an equidigital number, since it uses as much as digits as its factorization.

28747387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 526848, while the sum is 46.

The square root of 28747387 is about 5361.6589783387. The cubic root of 28747387 is about 306.3370025198.

It can be divided in two parts, 287 and 47387, that added together give a palindrome (47674).

The spelling of 28747387 in words is "twenty-eight million, seven hundred forty-seven thousand, three hundred eighty-seven".