28766278 has 8 divisors (see below), whose sum is σ = 45687672. Its totient is φ = 13537056.

The previous prime is 28766239. The next prime is 28766281. The reversal of 28766278 is 87266782.

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 423000 + ... + 423067.

It is an arithmetic number, because the mean of its divisors is an integer number (5710959).

Almost surely, 2^28766278 is an apocalyptic number.

28766278 is a deficient number, since it is larger than the sum of its proper divisors (16921394).

28766278 is a wasteful number, since it uses less digits than its factorization.

28766278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 846086.

The product of its digits is 451584, while the sum is 46.

The square root of 28766278 is about 5363.4203639096. The cubic root of 28766278 is about 306.4040897204.

The spelling of 28766278 in words is "twenty-eight million, seven hundred sixty-six thousand, two hundred seventy-eight".