28120232 has 32 divisors (see below), whose sum is σ = 60505920. Its totient is φ = 12001920.

The previous prime is 28120231. The next prime is 28120249. The reversal of 28120232 is 23202182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28120231) 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, 14843 + ... + 16629.

It is an arithmetic number, because the mean of its divisors is an integer number (1890810).

Almost surely, 2^28120232 is an apocalyptic number.

It is an amenable number.

28120232 is an abundant number, since it is smaller than the sum of its proper divisors (32385688).

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

28120232 is a wasteful number, since it uses less digits than its factorization.

28120232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2081 (or 2077 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 28120232 is about 5302.8513084943. The cubic root of 28120232 is about 304.0929136583.

The spelling of 28120232 in words is "twenty-eight million, one hundred twenty thousand, two hundred thirty-two".