28672079 has 4 divisors (see below), whose sum is σ = 29371440. Its totient is φ = 27972720.

The previous prime is 28672073. The next prime is 28672093. The reversal of 28672079 is 97027682.

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 28672079 - 2²⁰ = 27623503 is a prime.

It is a super-2 number, since 2×28672079² = 1644176228364482, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41), and also a Moran number because the ratio is a prime number: 699319 = 28672079 / (2 + 8 + 6 + 7 + 2 + 0 + 7 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28672073) 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, 349619 + ... + 349700.

It is an arithmetic number, because the mean of its divisors is an integer number (7342860).

Almost surely, 2^28672079 is an apocalyptic number.

28672079 is a deficient number, since it is larger than the sum of its proper divisors (699361).

28672079 is an equidigital number, since it uses as much as digits as its factorization.

28672079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699360.

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 28672079 is about 5354.6315466146. The cubic root of 28672079 is about 306.0692703474.

The spelling of 28672079 in words is "twenty-eight million, six hundred seventy-two thousand, seventy-nine".