28242404 has 12 divisors (see below), whose sum is σ = 51128700. Its totient is φ = 13634208.

The previous prime is 28242397. The next prime is 28242407. The reversal of 28242404 is 40424282.

It can be written as a sum of positive squares in 2 ways, for example, as 9302500 + 18939904 = 3050^2 + 4352^2 .

It is not an unprimeable number, because it can be changed into a prime (28242407) 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, 121619 + ... + 121850.

It is an arithmetic number, because the mean of its divisors is an integer number (4260725).

Almost surely, 2^28242404 is an apocalyptic number.

It is an amenable number.

28242404 is a deficient number, since it is larger than the sum of its proper divisors (22886296).

28242404 is a wasteful number, since it uses less digits than its factorization.

28242404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243502 (or 243500 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 26.

The square root of 28242404 is about 5314.3582867549. The cubic root of 28242404 is about 304.5326678012.

Adding to 28242404 its reverse (40424282), we get a palindrome (68666686).

The spelling of 28242404 in words is "twenty-eight million, two hundred forty-two thousand, four hundred four".