28133672 has 32 divisors (see below), whose sum is σ = 61430400. Its totient is φ = 11828544.

The previous prime is 28133671. The next prime is 28133687. The reversal of 28133672 is 27633182.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28133671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1772 + ... + 7707.

It is an arithmetic number, because the mean of its divisors is an integer number (1919700).

Almost surely, 2^28133672 is an apocalyptic number.

It is an amenable number.

28133672 is an abundant number, since it is smaller than the sum of its proper divisors (33296728).

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

28133672 is a wasteful number, since it uses less digits than its factorization.

28133672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9545 (or 9541 counting only the distinct ones).

The product of its digits is 12096, while the sum is 32.

The square root of 28133672 is about 5304.1183998851. The cubic root of 28133672 is about 304.1413527775.

The spelling of 28133672 in words is "twenty-eight million, one hundred thirty-three thousand, six hundred seventy-two".