28695487 has 4 divisors (see below), whose sum is σ = 28758736. Its totient is φ = 28632240.

The previous prime is 28695481. The next prime is 28695503. The reversal of 28695487 is 78459682.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28695487 - 2³ = 28695479 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28695487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28695481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30939 + ... + 31852.

It is an arithmetic number, because the mean of its divisors is an integer number (7189684).

Almost surely, 2^28695487 is an apocalyptic number.

28695487 is a deficient number, since it is larger than the sum of its proper divisors (63249).

28695487 is an equidigital number, since it uses as much as digits as its factorization.

28695487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63248.

The product of its digits is 967680, while the sum is 49.

The square root of 28695487 is about 5356.8168719866. The cubic root of 28695487 is about 306.1525397500.

The spelling of 28695487 in words is "twenty-eight million, six hundred ninety-five thousand, four hundred eighty-seven".