28770789 has 8 divisors (see below), whose sum is σ = 38408032. Its totient is φ = 19157040.

The previous prime is 28770767. The next prime is 28770799. The reversal of 28770789 is 98707782.

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

It is not a de Polignac number, because 28770789 - 2⁵ = 28770757 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 (28770739) 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 7 ways as a sum of consecutive naturals, for example, 2782 + ... + 8079.

It is an arithmetic number, because the mean of its divisors is an integer number (4801004).

Almost surely, 2^28770789 is an apocalyptic number.

It is an amenable number.

28770789 is a deficient number, since it is larger than the sum of its proper divisors (9637243).

28770789 is a wasteful number, since it uses less digits than its factorization.

28770789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11747.

The product of its (nonzero) digits is 395136, while the sum is 48.

The square root of 28770789 is about 5363.8408813088. The cubic root of 28770789 is about 306.4201051929.

The spelling of 28770789 in words is "twenty-eight million, seven hundred seventy thousand, seven hundred eighty-nine".