28263686 has 8 divisors (see below), whose sum is σ = 46249704. Its totient is φ = 12847120.

The previous prime is 28263667. The next prime is 28263691. The reversal of 28263686 is 68636282.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 642335 + ... + 642378.

It is an arithmetic number, because the mean of its divisors is an integer number (5781213).

Almost surely, 2^28263686 is an apocalyptic number.

28263686 is a deficient number, since it is larger than the sum of its proper divisors (17986018).

28263686 is a wasteful number, since it uses less digits than its factorization.

28263686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1284726.

The product of its digits is 165888, while the sum is 41.

The square root of 28263686 is about 5316.3602210535. The cubic root of 28263686 is about 304.6091418977.

The spelling of 28263686 in words is "twenty-eight million, two hundred sixty-three thousand, six hundred eighty-six".