28678684 has 6 divisors (see below), whose sum is σ = 50187704. Its totient is φ = 14339340.

The previous prime is 28678681. The next prime is 28678687. The reversal of 28678684 is 48687682.

It is an interprime number because it is at equal distance from previous prime (28678681) and next prime (28678687).

It is a super-3 number, since 3×28678684³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28678681) by changing a digit.

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 as a sum of consecutive naturals, namely, 3584832 + ... + 3584839.

Almost surely, 2^28678684 is an apocalyptic number.

It is an amenable number.

28678684 is a deficient number, since it is larger than the sum of its proper divisors (21509020).

28678684 is a wasteful number, since it uses less digits than its factorization.

28678684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7169675 (or 7169673 counting only the distinct ones).

The product of its digits is 1032192, while the sum is 49.

The square root of 28678684 is about 5355.2482668874. The cubic root of 28678684 is about 306.0927709374.

The spelling of 28678684 in words is "twenty-eight million, six hundred seventy-eight thousand, six hundred eighty-four".