28368506 has 4 divisors (see below), whose sum is σ = 42552762. Its totient is φ = 14184252.

The previous prime is 28368497. The next prime is 28368511. The reversal of 28368506 is 60586382.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60586382 = 2 ⋅30293191.

It can be written as a sum of positive squares in only one way, i.e., 21298225 + 7070281 = 4615^2 + 2659^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28368506.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7092125 + ... + 7092128.

Almost surely, 2^28368506 is an apocalyptic number.

28368506 is a deficient number, since it is larger than the sum of its proper divisors (14184256).

28368506 is a wasteful number, since it uses less digits than its factorization.

28368506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14184255.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 28368506 is about 5326.2093462424. The cubic root of 28368506 is about 304.9852398124.

The spelling of 28368506 in words is "twenty-eight million, three hundred sixty-eight thousand, five hundred six".