28447659 has 8 divisors (see below), whose sum is σ = 42144720. Its totient is φ = 18965088.

The previous prime is 28447651. The next prime is 28447687. The reversal of 28447659 is 95674482.

It is a happy number.

It is not a de Polignac number, because 28447659 - 2³ = 28447651 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28447651) 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, 526782 + ... + 526835.

It is an arithmetic number, because the mean of its divisors is an integer number (5268090).

Almost surely, 2^28447659 is an apocalyptic number.

28447659 is a deficient number, since it is larger than the sum of its proper divisors (13697061).

28447659 is a wasteful number, since it uses less digits than its factorization.

28447659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1053626 (or 1053620 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 28447659 is about 5333.6346894027. The cubic root of 28447659 is about 305.2686301254.

The spelling of 28447659 in words is "twenty-eight million, four hundred forty-seven thousand, six hundred fifty-nine".