28136546 has 4 divisors (see below), whose sum is σ = 42204822. Its totient is φ = 14068272.

The previous prime is 28136531. The next prime is 28136551. The reversal of 28136546 is 64563182.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 26635921 + 1500625 = 5161^2 + 1225^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7034135 + ... + 7034138.

Almost surely, 2^28136546 is an apocalyptic number.

28136546 is a deficient number, since it is larger than the sum of its proper divisors (14068276).

28136546 is a wasteful number, since it uses less digits than its factorization.

28136546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14068275.

The product of its digits is 34560, while the sum is 35.

The square root of 28136546 is about 5304.3893145206. The cubic root of 28136546 is about 304.1517089619.

It can be divided in two parts, 28136 and 546, that added together give a palindrome (28682).

The spelling of 28136546 in words is "twenty-eight million, one hundred thirty-six thousand, five hundred forty-six".