28788678 has 24 divisors (see below), whose sum is σ = 62507016. Its totient is φ = 9576000.

The previous prime is 28788673. The next prime is 28788689. The reversal of 28788678 is 87688782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28788673) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8878 + ... + 11678.

It is an arithmetic number, because the mean of its divisors is an integer number (2604459).

Almost surely, 2^28788678 is an apocalyptic number.

28788678 is an abundant number, since it is smaller than the sum of its proper divisors (33718338).

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

28788678 is a wasteful number, since it uses less digits than its factorization.

28788678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3380 (or 3377 counting only the distinct ones).

The product of its digits is 2408448, while the sum is 54.

The square root of 28788678 is about 5365.5081772373. The cubic root of 28788678 is about 306.4836003066.

The spelling of 28788678 in words is "twenty-eight million, seven hundred eighty-eight thousand, six hundred seventy-eight".