28567538 has 8 divisors (see below), whose sum is σ = 42874032. Its totient is φ = 14276196.

The previous prime is 28567537. The next prime is 28567559. The reversal of 28567538 is 83576582.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×28567538² = 1632208454762888, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28567537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5081 + ... + 9107.

It is an arithmetic number, because the mean of its divisors is an integer number (5359254).

Almost surely, 2^28567538 is an apocalyptic number.

28567538 is a deficient number, since it is larger than the sum of its proper divisors (14306494).

28567538 is a wasteful number, since it uses less digits than its factorization.

28567538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7576.

The product of its digits is 403200, while the sum is 44.

The square root of 28567538 is about 5344.8608962255. The cubic root of 28567538 is about 305.6968318939.

The spelling of 28567538 in words is "twenty-eight million, five hundred sixty-seven thousand, five hundred thirty-eight".