28718248 has 16 divisors (see below), whose sum is σ = 57988980. Its totient is φ = 13254528.

The previous prime is 28718243. The next prime is 28718267. The reversal of 28718248 is 84281782.

It can be written as a sum of positive squares in 2 ways, for example, as 20412324 + 8305924 = 4518^2 + 2882^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28718248.

It is not an unprimeable number, because it can be changed into a prime (28718243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137965 + ... + 138172.

Almost surely, 2^28718248 is an apocalyptic number.

It is an amenable number.

28718248 is an abundant number, since it is smaller than the sum of its proper divisors (29270732).

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

28718248 is a wasteful number, since it uses less digits than its factorization.

28718248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276156 (or 276152 counting only the distinct ones).

The product of its digits is 57344, while the sum is 40.

The square root of 28718248 is about 5358.9409401485. The cubic root of 28718248 is about 306.2334641634.

The spelling of 28718248 in words is "twenty-eight million, seven hundred eighteen thousand, two hundred forty-eight".