28445087 has 8 divisors (see below), whose sum is σ = 31117440. Its totient is φ = 25787160.

The previous prime is 28445041. The next prime is 28445101. The reversal of 28445087 is 78054482.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28445087 - 2⁸ = 28444831 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 28445087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28445987) 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 7 ways as a sum of consecutive naturals, for example, 758 + ... + 7580.

It is an arithmetic number, because the mean of its divisors is an integer number (3889680).

Almost surely, 2^28445087 is an apocalyptic number.

28445087 is a deficient number, since it is larger than the sum of its proper divisors (2672353).

28445087 is a wasteful number, since it uses less digits than its factorization.

28445087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7213.

The product of its (nonzero) digits is 71680, while the sum is 38.

The square root of 28445087 is about 5333.3935725765. The cubic root of 28445087 is about 305.2594299005.

The spelling of 28445087 in words is "twenty-eight million, four hundred forty-five thousand, eighty-seven".