28286626 has 4 divisors (see below), whose sum is σ = 42429942. Its totient is φ = 14143312.

The previous prime is 28286617. The next prime is 28286633. The reversal of 28286626 is 62668282.

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., 22992025 + 5294601 = 4795^2 + 2301^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7071655 + ... + 7071658.

Almost surely, 2^28286626 is an apocalyptic number.

28286626 is a deficient number, since it is larger than the sum of its proper divisors (14143316).

28286626 is a wasteful number, since it uses less digits than its factorization.

28286626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14143315.

The product of its digits is 110592, while the sum is 40.

The square root of 28286626 is about 5318.5172745794. The cubic root of 28286626 is about 304.6915308220.

The spelling of 28286626 in words is "twenty-eight million, two hundred eighty-six thousand, six hundred twenty-six".