28275242 has 4 divisors (see below), whose sum is σ = 42412866. Its totient is φ = 14137620.

The previous prime is 28275239. The next prime is 28275307. The reversal of 28275242 is 24257282.

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., 22934521 + 5340721 = 4789^2 + 2311^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28275199 and 28275208.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7068809 + ... + 7068812.

Almost surely, 2^28275242 is an apocalyptic number.

28275242 is a deficient number, since it is larger than the sum of its proper divisors (14137624).

28275242 is a wasteful number, since it uses less digits than its factorization.

28275242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14137623.

The product of its digits is 17920, while the sum is 32.

The square root of 28275242 is about 5317.4469437880. The cubic root of 28275242 is about 304.6506507985.

The spelling of 28275242 in words is "twenty-eight million, two hundred seventy-five thousand, two hundred forty-two".