28755506 has 16 divisors (see below), whose sum is σ = 46599000. Its totient is φ = 13229568.

The previous prime is 28755481. The next prime is 28755511. The reversal of 28755506 is 60555782.

It can be written as a sum of positive squares in 4 ways, for example, as 26429881 + 2325625 = 5141^2 + 1525^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28755506.

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 7 ways as a sum of consecutive naturals, for example, 7490 + ... + 10658.

Almost surely, 2^28755506 is an apocalyptic number.

28755506 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

28755506 is a deficient number, since it is larger than the sum of its proper divisors (17843494).

28755506 is a wasteful number, since it uses less digits than its factorization.

28755506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3533.

The product of its (nonzero) digits is 84000, while the sum is 38.

The square root of 28755506 is about 5362.4160599491. The cubic root of 28755506 is about 306.3658389495.

The spelling of 28755506 in words is "twenty-eight million, seven hundred fifty-five thousand, five hundred six".