28642332 has 12 divisors (see below), whose sum is σ = 66832136. Its totient is φ = 9547440.

The previous prime is 28642321. The next prime is 28642349. The reversal of 28642332 is 23324682.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 28642332.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1193419 + ... + 1193442.

Almost surely, 2^28642332 is an apocalyptic number.

It is an amenable number.

28642332 is an abundant number, since it is smaller than the sum of its proper divisors (38189804).

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

28642332 is a wasteful number, since it uses less digits than its factorization.

28642332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2386868 (or 2386866 counting only the distinct ones).

The product of its digits is 13824, while the sum is 30.

The square root of 28642332 is about 5351.8531369984. The cubic root of 28642332 is about 305.9633857682.

The spelling of 28642332 in words is "twenty-eight million, six hundred forty-two thousand, three hundred thirty-two".