28389038 has 8 divisors (see below), whose sum is σ = 44435088. Its totient is φ = 13577344.

The previous prime is 28389037. The next prime is 28389041. The reversal of 28389038 is 83098382.

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 = 28388986 and 28389004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28389037) 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, 308531 + ... + 308622.

It is an arithmetic number, because the mean of its divisors is an integer number (5554386).

Almost surely, 2^28389038 is an apocalyptic number.

28389038 is a deficient number, since it is larger than the sum of its proper divisors (16046050).

28389038 is a wasteful number, since it uses less digits than its factorization.

28389038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617178.

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 28389038 is about 5328.1364472018. The cubic root of 28389038 is about 305.0588008104.

The spelling of 28389038 in words is "twenty-eight million, three hundred eighty-nine thousand, thirty-eight".