28595389 has 4 divisors (see below), whose sum is σ = 28615356. Its totient is φ = 28575424.

The previous prime is 28595383. The next prime is 28595401. The reversal of 28595389 is 98359582.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4995225 + 23600164 = 2235^2 + 4858^2 .

It is a cyclic number.

It is not a de Polignac number, because 28595389 - 2³ = 28595381 is a prime.

It is a super-2 number, since 2×28595389² = 1635392544122642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28595381) 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, 7654 + ... + 10759.

It is an arithmetic number, because the mean of its divisors is an integer number (7153839).

Almost surely, 2^28595389 is an apocalyptic number.

It is an amenable number.

28595389 is a deficient number, since it is larger than the sum of its proper divisors (19967).

28595389 is a wasteful number, since it uses less digits than its factorization.

28595389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19966.

The product of its digits is 777600, while the sum is 49.

The square root of 28595389 is about 5347.4656614138. The cubic root of 28595389 is about 305.7961427173.

The spelling of 28595389 in words is "twenty-eight million, five hundred ninety-five thousand, three hundred eighty-nine".