28975079 has 4 divisors (see below), whose sum is σ = 33114384. Its totient is φ = 24835776.

The previous prime is 28974989. The next prime is 28975081. The reversal of 28975079 is 97057982.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-28975079 is a prime.

It is a pancake number, because a pancake can be divided into 28975079 parts by 7612 straight cuts.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28975879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2069642 + ... + 2069655.

It is an arithmetic number, because the mean of its divisors is an integer number (8278596).

Almost surely, 2^28975079 is an apocalyptic number.

28975079 is a deficient number, since it is larger than the sum of its proper divisors (4139305).

28975079 is an equidigital number, since it uses as much as digits as its factorization.

28975079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4139304.

The product of its (nonzero) digits is 317520, while the sum is 47.

The square root of 28975079 is about 5382.8504530592. The cubic root of 28975079 is about 307.1436513616.

The spelling of 28975079 in words is "twenty-eight million, nine hundred seventy-five thousand, seventy-nine".