28871536 has 20 divisors (see below), whose sum is σ = 57130272. Its totient is φ = 14128256.

The previous prime is 28871519. The next prime is 28871537. The reversal of 28871536 is 63517882.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28871537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18445 + ... + 19948.

Almost surely, 2^28871536 is an apocalyptic number.

It is an amenable number.

28871536 is a deficient number, since it is larger than the sum of its proper divisors (28258736).

28871536 is a wasteful number, since it uses less digits than its factorization.

28871536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38448 (or 38442 counting only the distinct ones).

The product of its digits is 80640, while the sum is 40.

The square root of 28871536 is about 5373.2239856533. The cubic root of 28871536 is about 306.7773534492. Note that the first 3 decimals are identical.

It can be divided in two parts, 288 and 71536, that added together give a square (71824 = 268²).

The spelling of 28871536 in words is "twenty-eight million, eight hundred seventy-one thousand, five hundred thirty-six".