28559642 has 4 divisors (see below), whose sum is σ = 42839466. Its totient is φ = 14279820.

The previous prime is 28559627. The next prime is 28559647. The reversal of 28559642 is 24695582.

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

It can be written as a sum of positive squares in only one way, i.e., 26306641 + 2253001 = 5129^2 + 1501^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28559642.

It is not an unprimeable number, because it can be changed into a prime (28559647) 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 as a sum of consecutive naturals, namely, 7139909 + ... + 7139912.

Almost surely, 2^28559642 is an apocalyptic number.

28559642 is a deficient number, since it is larger than the sum of its proper divisors (14279824).

28559642 is a wasteful number, since it uses less digits than its factorization.

28559642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14279823.

The product of its digits is 172800, while the sum is 41.

The square root of 28559642 is about 5344.1221917168. The cubic root of 28559642 is about 305.6686646713.

The spelling of 28559642 in words is "twenty-eight million, five hundred fifty-nine thousand, six hundred forty-two".