28700779 has 8 divisors (see below), whose sum is σ = 29776320. Its totient is φ = 27643200.

The previous prime is 28700759. The next prime is 28700783. The reversal of 28700779 is 97700782.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28700779 - 2⁵ = 28700747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28700759) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1192 + ... + 7669.

It is an arithmetic number, because the mean of its divisors is an integer number (3722040).

Almost surely, 2^28700779 is an apocalyptic number.

28700779 is a deficient number, since it is larger than the sum of its proper divisors (1075541).

28700779 is an equidigital number, since it uses as much as digits as its factorization.

28700779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8981.

The product of its (nonzero) digits is 49392, while the sum is 40.

The square root of 28700779 is about 5357.3107992723. The cubic root of 28700779 is about 306.1713587331.

The spelling of 28700779 in words is "twenty-eight million, seven hundred thousand, seven hundred seventy-nine".