28038556 has 24 divisors (see below), whose sum is σ = 60391520. Its totient is φ = 11092032.

The previous prime is 28038551. The next prime is 28038583. The reversal of 28038556 is 65583082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28038551) 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, 38151 + ... + 38878.

Almost surely, 2^28038556 is an apocalyptic number.

28038556 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

28038556 is an abundant number, since it is smaller than the sum of its proper divisors (32352964).

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

28038556 is a wasteful number, since it uses less digits than its factorization.

28038556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77053 (or 77051 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 37.

The square root of 28038556 is about 5295.1445683758. The cubic root of 28038556 is about 303.7982126951.

The spelling of 28038556 in words is "twenty-eight million, thirty-eight thousand, five hundred fifty-six".