28265786 has 4 divisors (see below), whose sum is σ = 42398682. Its totient is φ = 14132892.

The previous prime is 28265767. The next prime is 28265791. The reversal of 28265786 is 68756282.

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., 25816561 + 2449225 = 5081^2 + 1565^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7066445 + ... + 7066448.

Almost surely, 2^28265786 is an apocalyptic number.

28265786 is a deficient number, since it is larger than the sum of its proper divisors (14132896).

28265786 is a wasteful number, since it uses less digits than its factorization.

28265786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14132895.

The product of its digits is 322560, while the sum is 44.

The square root of 28265786 is about 5316.5577209318. The cubic root of 28265786 is about 304.6166858932.

The spelling of 28265786 in words is "twenty-eight million, two hundred sixty-five thousand, seven hundred eighty-six".