28787045 has 16 divisors (see below), whose sum is σ = 39633408. Its totient is φ = 19662720.

The previous prime is 28787041. The next prime is 28787051. The reversal of 28787045 is 54078782.

It is not a de Polignac number, because 28787045 - 2² = 28787041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28786993 and 28787011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28787041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8372 + ... + 11298.

It is an arithmetic number, because the mean of its divisors is an integer number (2477088).

Almost surely, 2^28787045 is an apocalyptic number.

It is an amenable number.

28787045 is a deficient number, since it is larger than the sum of its proper divisors (10846363).

28787045 is a wasteful number, since it uses less digits than its factorization.

28787045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3220.

The product of its (nonzero) digits is 125440, while the sum is 41.

The square root of 28787045 is about 5365.3559993723. The cubic root of 28787045 is about 306.4778052369.

The spelling of 28787045 in words is "twenty-eight million, seven hundred eighty-seven thousand, forty-five".