28575789 has 8 divisors (see below), whose sum is σ = 41564832. Its totient is φ = 17318640.

The previous prime is 28575763. The next prime is 28575839. The reversal of 28575789 is 98757582.

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

It is not a de Polignac number, because 28575789 - 2⁹ = 28575277 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28573789) 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, 432934 + ... + 432999.

It is an arithmetic number, because the mean of its divisors is an integer number (5195604).

Almost surely, 2^28575789 is an apocalyptic number.

It is an amenable number.

28575789 is a deficient number, since it is larger than the sum of its proper divisors (12989043).

28575789 is a wasteful number, since it uses less digits than its factorization.

28575789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865947.

The product of its digits is 1411200, while the sum is 51.

The square root of 28575789 is about 5345.6327034318. The cubic root of 28575789 is about 305.7262599551.

It can be divided in two parts, 2857 and 5789, that added together give a triangular number (8646 = T₁₃₁).

The spelling of 28575789 in words is "twenty-eight million, five hundred seventy-five thousand, seven hundred eighty-nine".