28286678 has 8 divisors (see below), whose sum is σ = 48491472. Its totient is φ = 12122856.

The previous prime is 28286677. The next prime is 28286717. The reversal of 28286678 is 87668282.

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 (28286677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1010225 + ... + 1010252.

It is an arithmetic number, because the mean of its divisors is an integer number (6061434).

Almost surely, 2^28286678 is an apocalyptic number.

28286678 is a deficient number, since it is larger than the sum of its proper divisors (20204794).

28286678 is a wasteful number, since it uses less digits than its factorization.

28286678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2020486.

The product of its digits is 516096, while the sum is 47.

The square root of 28286678 is about 5318.5221631577. The cubic root of 28286678 is about 304.6917175292.

The spelling of 28286678 in words is "twenty-eight million, two hundred eighty-six thousand, six hundred seventy-eight".