28569438 has 24 divisors (see below), whose sum is σ = 63070488. Its totient is φ = 9343152.

The previous prime is 28569433. The next prime is 28569449. The reversal of 28569438 is 83496582.

It is a junction number, because it is equal to n+sod(n) for n = 28569393 and 28569402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28569433) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14020 + ... + 15927.

It is an arithmetic number, because the mean of its divisors is an integer number (2627937).

Almost surely, 2^28569438 is an apocalyptic number.

28569438 is an abundant number, since it is smaller than the sum of its proper divisors (34501050).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28569438 is a wasteful number, since it uses less digits than its factorization.

28569438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30008 (or 30005 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 28569438 is about 5345.0386340980. The cubic root of 28569438 is about 305.7036089463.

The spelling of 28569438 in words is "twenty-eight million, five hundred sixty-nine thousand, four hundred thirty-eight".