28532538 has 24 divisors (see below), whose sum is σ = 62101728. Its totient is φ = 9467592.

The previous prime is 28532533. The next prime is 28532551. The reversal of 28532538 is 83523582.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28532533) 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, 595 + ... + 7577.

It is an arithmetic number, because the mean of its divisors is an integer number (2587572).

Almost surely, 2^28532538 is an apocalyptic number.

28532538 is an abundant number, since it is smaller than the sum of its proper divisors (33569190).

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

28532538 is a wasteful number, since it uses less digits than its factorization.

28532538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7218 (or 7215 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

The square root of 28532538 is about 5341.5857196155. The cubic root of 28532538 is about 305.5719376683.

It can be divided in two parts, 285 and 32538, that added together give a palindrome (32823).

The spelling of 28532538 in words is "twenty-eight million, five hundred thirty-two thousand, five hundred thirty-eight".