28767886 has 8 divisors (see below), whose sum is σ = 49316400. Its totient is φ = 12329088.

The previous prime is 28767839. The next prime is 28767911. The reversal of 28767886 is 68876782.

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, 1027411 + ... + 1027438.

It is an arithmetic number, because the mean of its divisors is an integer number (6164550).

Almost surely, 2^28767886 is an apocalyptic number.

28767886 is a deficient number, since it is larger than the sum of its proper divisors (20548514).

28767886 is a wasteful number, since it uses less digits than its factorization.

28767886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2054858.

The product of its digits is 1806336, while the sum is 52.

The square root of 28767886 is about 5363.5702661567. The cubic root of 28767886 is about 306.4097988195.

The spelling of 28767886 in words is "twenty-eight million, seven hundred sixty-seven thousand, eight hundred eighty-six".