28242842 has 4 divisors (see below), whose sum is σ = 42364266. Its totient is φ = 14121420.

The previous prime is 28242791. The next prime is 28242859. The reversal of 28242842 is 24824282.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 20784481 + 7458361 = 4559^2 + 2731^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28242799 and 28242808.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7060709 + ... + 7060712.

It is a self-describing number.

Almost surely, 2^28242842 is an apocalyptic number.

28242842 is a deficient number, since it is larger than the sum of its proper divisors (14121424).

28242842 is a wasteful number, since it uses less digits than its factorization.

28242842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14121423.

The product of its digits is 16384, while the sum is 32.

The square root of 28242842 is about 5314.3994957097. The cubic root of 28242842 is about 304.5342420843.

The spelling of 28242842 in words is "twenty-eight million, two hundred forty-two thousand, eight hundred forty-two".