28385436 has 24 divisors (see below), whose sum is σ = 66430224. Its totient is φ = 9433600.

The previous prime is 28385417. The next prime is 28385437. The reversal of 28385436 is 63458382.

It is a junction number, because it is equal to n+sod(n) for n = 28385394 and 28385403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28385437) 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, 886 + ... + 7586.

It is an arithmetic number, because the mean of its divisors is an integer number (2767926).

Almost surely, 2^28385436 is an apocalyptic number.

It is an amenable number.

28385436 is an abundant number, since it is smaller than the sum of its proper divisors (38044788).

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

28385436 is a wasteful number, since it uses less digits than its factorization.

28385436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7061 (or 7059 counting only the distinct ones).

The product of its digits is 138240, while the sum is 39.

The square root of 28385436 is about 5327.7984196101. The cubic root of 28385436 is about 305.0458983152.

The spelling of 28385436 in words is "twenty-eight million, three hundred eighty-five thousand, four hundred thirty-six".