28117038 has 16 divisors (see below), whose sum is σ = 56678400. Its totient is φ = 9298296.

The previous prime is 28117027. The next prime is 28117039. The reversal of 28117038 is 83071182.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 28116996 and 28117014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28117039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17688 + ... + 19211.

It is an arithmetic number, because the mean of its divisors is an integer number (3542400).

Almost surely, 2^28117038 is an apocalyptic number.

28117038 is an abundant number, since it is smaller than the sum of its proper divisors (28561362).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28117038 is a wasteful number, since it uses less digits than its factorization.

28117038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37031.

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 28117038 is about 5302.5501412056. The cubic root of 28117038 is about 304.0813998896.

The spelling of 28117038 in words is "twenty-eight million, one hundred seventeen thousand, thirty-eight".