28242448 has 20 divisors (see below), whose sum is σ = 58929388. Its totient is φ = 13034880.

The previous prime is 28242407. The next prime is 28242449. The reversal of 28242448 is 84424282.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1327104 + 26915344 = 1152^2 + 5188^2 .

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (28242449) 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, 67683 + ... + 68098.

Almost surely, 2^28242448 is an apocalyptic number.

It is an amenable number.

28242448 is an abundant number, since it is smaller than the sum of its proper divisors (30686940).

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

28242448 is a wasteful number, since it uses less digits than its factorization.

28242448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135802 (or 135796 counting only the distinct ones).

The product of its digits is 32768, while the sum is 34.

The square root of 28242448 is about 5314.3624264817. The cubic root of 28242448 is about 304.5328259491.

The spelling of 28242448 in words is "twenty-eight million, two hundred forty-two thousand, four hundred forty-eight".