28263766 has 8 divisors (see below), whose sum is σ = 42419520. Its totient is φ = 14123928.

The previous prime is 28263743. The next prime is 28263769. The reversal of 28263766 is 66736282.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28263769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2715 + ... + 7993.

It is an arithmetic number, because the mean of its divisors is an integer number (5302440).

Almost surely, 2^28263766 is an apocalyptic number.

28263766 is a deficient number, since it is larger than the sum of its proper divisors (14155754).

28263766 is a wasteful number, since it uses less digits than its factorization.

28263766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7958.

The product of its digits is 145152, while the sum is 40.

The square root of 28263766 is about 5316.3677449928. The cubic root of 28263766 is about 304.6094292949.

The spelling of 28263766 in words is "twenty-eight million, two hundred sixty-three thousand, seven hundred sixty-six".