28987755 has 16 divisors (see below), whose sum is σ = 46717440. Its totient is φ = 15347808.

The previous prime is 28987747. The next prime is 28987769. The reversal of 28987755 is 55778982.

It is not a de Polignac number, because 28987755 - 2³ = 28987747 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28987698 and 28987707.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4867 + ... + 9036.

It is an arithmetic number, because the mean of its divisors is an integer number (2919840).

Almost surely, 2^28987755 is an apocalyptic number.

28987755 is a deficient number, since it is larger than the sum of its proper divisors (17729685).

28987755 is a wasteful number, since it uses less digits than its factorization.

28987755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14050.

The product of its digits is 1411200, while the sum is 51.

The square root of 28987755 is about 5384.0277673875. The cubic root of 28987755 is about 307.1884345045.

The spelling of 28987755 in words is "twenty-eight million, nine hundred eighty-seven thousand, seven hundred fifty-five".