28746686 has 8 divisors (see below), whose sum is σ = 43147080. Its totient is φ = 14364328.

The previous prime is 28746673. The next prime is 28746691. The reversal of 28746686 is 68664782.

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

It is a self number, because there is not a number n which added to its sum of digits gives 28746686.

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, 665 + ... + 7611.

It is an arithmetic number, because the mean of its divisors is an integer number (5393385).

Almost surely, 2^28746686 is an apocalyptic number.

28746686 is a deficient number, since it is larger than the sum of its proper divisors (14400394).

28746686 is a wasteful number, since it uses less digits than its factorization.

28746686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9018.

The product of its digits is 774144, while the sum is 47.

The square root of 28746686 is about 5361.5936063823. The cubic root of 28746686 is about 306.3345125081.

The spelling of 28746686 in words is "twenty-eight million, seven hundred forty-six thousand, six hundred eighty-six".