28204079 has 4 divisors (see below), whose sum is σ = 29113920. Its totient is φ = 27294240.

The previous prime is 28204067. The next prime is 28204081. The reversal of 28204079 is 97040282.

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 28204079 - 2⁸ = 28203823 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 (28204019) 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, 454874 + ... + 454935.

It is an arithmetic number, because the mean of its divisors is an integer number (7278480).

Almost surely, 2^28204079 is an apocalyptic number.

28204079 is a deficient number, since it is larger than the sum of its proper divisors (909841).

28204079 is an equidigital number, since it uses as much as digits as its factorization.

28204079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909840.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 28204079 is about 5310.7512651225. The cubic root of 28204079 is about 304.3948549606.

The spelling of 28204079 in words is "twenty-eight million, two hundred four thousand, seventy-nine".