28383132 has 24 divisors (see below), whose sum is σ = 70123536. Its totient is φ = 8904448.

The previous prime is 28383109. The next prime is 28383133. The reversal of 28383132 is 23138382.

It is a self number, because there is not a number n which added to its sum of digits gives 28383132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28383133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69363 + ... + 69770.

It is an arithmetic number, because the mean of its divisors is an integer number (2921814).

Almost surely, 2^28383132 is an apocalyptic number.

It is an amenable number.

28383132 is an abundant number, since it is smaller than the sum of its proper divisors (41740404).

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

28383132 is a wasteful number, since it uses less digits than its factorization.

28383132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139157 (or 139155 counting only the distinct ones).

The product of its digits is 6912, while the sum is 30.

The square root of 28383132 is about 5327.5821908254. The cubic root of 28383132 is about 305.0376447309.

The spelling of 28383132 in words is "twenty-eight million, three hundred eighty-three thousand, one hundred thirty-two".