28268487 has 16 divisors (see below), whose sum is σ = 45101280. Its totient is φ = 17395776.

The previous prime is 28268483. The next prime is 28268503. The reversal of 28268487 is 78486282.

It is a happy number.

It is not a de Polignac number, because 28268487 - 2² = 28268483 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28268483) 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 15 ways as a sum of consecutive naturals, for example, 39918 + ... + 40619.

It is an arithmetic number, because the mean of its divisors is an integer number (2818830).

Almost surely, 2^28268487 is an apocalyptic number.

28268487 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

28268487 is a deficient number, since it is larger than the sum of its proper divisors (16832793).

28268487 is a wasteful number, since it uses less digits than its factorization.

28268487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80559 (or 80553 counting only the distinct ones).

The product of its digits is 344064, while the sum is 45.

The square root of 28268487 is about 5316.8117326082. The cubic root of 28268487 is about 304.6263883589.

The spelling of 28268487 in words is "twenty-eight million, two hundred sixty-eight thousand, four hundred eighty-seven".