28770479 has 4 divisors (see below), whose sum is σ = 29472240. Its totient is φ = 28068720.

The previous prime is 28770473. The next prime is 28770509. The reversal of 28770479 is 97407782.

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 28770479 - 2²⁴ = 11993263 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 (28770473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 350819 + ... + 350900.

It is an arithmetic number, because the mean of its divisors is an integer number (7368060).

Almost surely, 2^28770479 is an apocalyptic number.

28770479 is a deficient number, since it is larger than the sum of its proper divisors (701761).

28770479 is an equidigital number, since it uses as much as digits as its factorization.

28770479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 701760.

The product of its (nonzero) digits is 197568, while the sum is 44.

The square root of 28770479 is about 5363.8119840278. The cubic root of 28770479 is about 306.4190046487.

The spelling of 28770479 in words is "twenty-eight million, seven hundred seventy thousand, four hundred seventy-nine".