28272412 has 18 divisors (see below), whose sum is σ = 57554952. Its totient is φ = 12116664.

The previous prime is 28272401. The next prime is 28272443. The reversal of 28272412 is 21427282.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 71928 + ... + 72319.

Almost surely, 2^28272412 is an apocalyptic number.

It is an amenable number.

28272412 is an abundant number, since it is smaller than the sum of its proper divisors (29282540).

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

28272412 is a wasteful number, since it uses less digits than its factorization.

28272412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144265 (or 144256 counting only the distinct ones).

The product of its digits is 3584, while the sum is 28.

The square root of 28272412 is about 5317.1808319823. The cubic root of 28272412 is about 304.6404865459.

Adding to 28272412 its reverse (21427282), we get a palindrome (49699694).

The spelling of 28272412 in words is "twenty-eight million, two hundred seventy-two thousand, four hundred twelve".