28518678 has 12 divisors (see below), whose sum is σ = 61790508. Its totient is φ = 9506220.

The previous prime is 28518671. The next prime is 28518683. The reversal of 28518678 is 87681582.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28518671) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 792168 + ... + 792203.

It is an arithmetic number, because the mean of its divisors is an integer number (5149209).

Almost surely, 2^28518678 is an apocalyptic number.

28518678 is an abundant number, since it is smaller than the sum of its proper divisors (33271830).

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

28518678 is a wasteful number, since it uses less digits than its factorization.

28518678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1584379 (or 1584376 counting only the distinct ones).

The product of its digits is 215040, while the sum is 45.

The square root of 28518678 is about 5340.2881944704. The cubic root of 28518678 is about 305.5224513239.

The spelling of 28518678 in words is "twenty-eight million, five hundred eighteen thousand, six hundred seventy-eight".