28555079 has 4 divisors (see below), whose sum is σ = 32634384. Its totient is φ = 24475776.

The previous prime is 28555069. The next prime is 28555091. The reversal of 28555079 is 97055582.

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 28555079 - 2⁴ = 28555063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28555049) 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, 2039642 + ... + 2039655.

It is an arithmetic number, because the mean of its divisors is an integer number (8158596).

Almost surely, 2^28555079 is an apocalyptic number.

28555079 is a deficient number, since it is larger than the sum of its proper divisors (4079305).

28555079 is an equidigital number, since it uses as much as digits as its factorization.

28555079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4079304.

The product of its (nonzero) digits is 126000, while the sum is 41.

The square root of 28555079 is about 5343.6952570295. The cubic root of 28555079 is about 305.6523848173.

The spelling of 28555079 in words is "twenty-eight million, five hundred fifty-five thousand, seventy-nine".