28008532 has 12 divisors (see below), whose sum is σ = 49230580. Its totient is φ = 13942656.

The previous prime is 28008517. The next prime is 28008551. The reversal of 28008532 is 23580082.

It can be written as a sum of positive squares in 2 ways, for example, as 19044496 + 8964036 = 4364^2 + 2994^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28008532.

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, 14373 + ... + 16204.

Almost surely, 2^28008532 is an apocalyptic number.

It is an amenable number.

28008532 is a deficient number, since it is larger than the sum of its proper divisors (21222048).

28008532 is a wasteful number, since it uses less digits than its factorization.

28008532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30810 (or 30808 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 28008532 is about 5292.3087589444. The cubic root of 28008532 is about 303.6897371233.

The spelling of 28008532 in words is "twenty-eight million, eight thousand, five hundred thirty-two".