28039030 has 8 divisors (see below), whose sum is σ = 50470272. Its totient is φ = 11215608.

The previous prime is 28039019. The next prime is 28039043. The reversal of 28039030 is 3093082.

It is a happy number.

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 = 28038986 and 28039004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1401942 + ... + 1401961.

It is an arithmetic number, because the mean of its divisors is an integer number (6308784).

Almost surely, 2^28039030 is an apocalyptic number.

28039030 is a deficient number, since it is larger than the sum of its proper divisors (22431242).

28039030 is a wasteful number, since it uses less digits than its factorization.

28039030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2803910.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 28039030 is about 5295.1893261714. The cubic root of 28039030 is about 303.7999246180.

The spelling of 28039030 in words is "twenty-eight million, thirty-nine thousand, thirty".