28678672 has 20 divisors (see below), whose sum is σ = 60616656. Its totient is φ = 13035680.

The previous prime is 28678667. The next prime is 28678681. The reversal of 28678672 is 27687682.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81298 + ... + 81649.

Almost surely, 2^28678672 is an apocalyptic number.

28678672 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

28678672 is the 2863-rd centered heptagonal number.

It is an amenable number.

28678672 is an abundant number, since it is smaller than the sum of its proper divisors (31937984).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28678672 is a wasteful number, since it uses less digits than its factorization.

28678672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162966 (or 162960 counting only the distinct ones).

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

The square root of 28678672 is about 5355.2471464910. The cubic root of 28678672 is about 306.0927282447.

The spelling of 28678672 in words is "twenty-eight million, six hundred seventy-eight thousand, six hundred seventy-two".