28579969 has 4 divisors (see below), whose sum is σ = 31178160. Its totient is φ = 25981780.

The previous prime is 28579963. The next prime is 28579987. The reversal of 28579969 is 96997582.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 28579969 - 2⁵ = 28579937 is a prime.

It is a super-2 number, since 2×28579969² = 1633629256081922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28579963) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1299079 + ... + 1299100.

It is an arithmetic number, because the mean of its divisors is an integer number (7794540).

Almost surely, 2^28579969 is an apocalyptic number.

It is an amenable number.

28579969 is a deficient number, since it is larger than the sum of its proper divisors (2598191).

28579969 is a wasteful number, since it uses less digits than its factorization.

28579969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2598190.

The product of its digits is 2449440, while the sum is 55.

The square root of 28579969 is about 5346.0236624991. The cubic root of 28579969 is about 305.7411662039.

The spelling of 28579969 in words is "twenty-eight million, five hundred seventy-nine thousand, nine hundred sixty-nine".