28055842 has 8 divisors (see below), whose sum is σ = 43221276. Its totient is φ = 13648752.

The previous prime is 28055827. The next prime is 28055843. The reversal of 28055842 is 24855082.

It can be written as a sum of positive squares in 2 ways, for example, as 20985561 + 7070281 = 4581^2 + 2659^2 .

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 = 28055798 and 28055807.

It is not an unprimeable number, because it can be changed into a prime (28055843) 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, 189493 + ... + 189640.

Almost surely, 2^28055842 is an apocalyptic number.

28055842 is a deficient number, since it is larger than the sum of its proper divisors (15165434).

28055842 is a wasteful number, since it uses less digits than its factorization.

28055842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379172.

The product of its (nonzero) digits is 25600, while the sum is 34.

The square root of 28055842 is about 5296.7765669320. The cubic root of 28055842 is about 303.8606312339.

The spelling of 28055842 in words is "twenty-eight million, fifty-five thousand, eight hundred forty-two".