28488242 has 8 divisors (see below), whose sum is σ = 43538796. Its totient is φ = 13975312.

The previous prime is 28488241. The next prime is 28488247. The reversal of 28488242 is 24288482.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 26635921 + 1852321 = 5161^2 + 1361^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 28488196 and 28488205.

It is not an unprimeable number, because it can be changed into a prime (28488241) 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, 134273 + ... + 134484.

Almost surely, 2^28488242 is an apocalyptic number.

28488242 is a deficient number, since it is larger than the sum of its proper divisors (15050554).

28488242 is a wasteful number, since it uses less digits than its factorization.

28488242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268812.

The product of its digits is 65536, while the sum is 38.

The square root of 28488242 is about 5337.4377748129. The cubic root of 28488242 is about 305.4137250205.

The spelling of 28488242 in words is "twenty-eight million, four hundred eighty-eight thousand, two hundred forty-two".