28071532 has 12 divisors (see below), whose sum is σ = 49181440. Its totient is φ = 14019696.

The previous prime is 28071497. The next prime is 28071541. The reversal of 28071532 is 23517082.

It is a self number, because there is not a number n which added to its sum of digits gives 28071532.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 469 + ... + 7507.

Almost surely, 2^28071532 is an apocalyptic number.

It is an amenable number.

28071532 is a deficient number, since it is larger than the sum of its proper divisors (21109908).

28071532 is a wasteful number, since it uses less digits than its factorization.

28071532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8040 (or 8038 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 28071532 is about 5298.2574493884. The cubic root of 28071532 is about 303.9172645349.

The spelling of 28071532 in words is "twenty-eight million, seventy-one thousand, five hundred thirty-two".