28030042 has 8 divisors (see below), whose sum is σ = 44518356. Its totient is φ = 13190592.

The previous prime is 28030033. The next prime is 28030061. The reversal of 28030042 is 24003082.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 21724921 + 6305121 = 4661^2 + 2511^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 412173 + ... + 412240.

Almost surely, 2^28030042 is an apocalyptic number.

28030042 is a deficient number, since it is larger than the sum of its proper divisors (16488314).

28030042 is a wasteful number, since it uses less digits than its factorization.

28030042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824432.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 28030042 is about 5294.3405632808. The cubic root of 28030042 is about 303.7674598058.

The spelling of 28030042 in words is "twenty-eight million, thirty thousand, forty-two".