28633132 has 24 divisors (see below), whose sum is σ = 54874512. Its totient is φ = 12964800.

The previous prime is 28633127. The next prime is 28633147. The reversal of 28633132 is 23133682.

It is a self number, because there is not a number n which added to its sum of digits gives 28633132.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11782 + ... + 14002.

It is an arithmetic number, because the mean of its divisors is an integer number (2286438).

Almost surely, 2^28633132 is an apocalyptic number.

28633132 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28633132 is a deficient number, since it is larger than the sum of its proper divisors (26241380).

28633132 is a wasteful number, since it uses less digits than its factorization.

28633132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2529 (or 2527 counting only the distinct ones).

The product of its digits is 5184, while the sum is 28.

The square root of 28633132 is about 5350.9935526031. The cubic root of 28633132 is about 305.9306234849.

It can be divided in two parts, 2863 and 3132, that added together give a palindrome (5995).

The spelling of 28633132 in words is "twenty-eight million, six hundred thirty-three thousand, one hundred thirty-two".