28034117 has 4 divisors (see below), whose sum is σ = 28418220. Its totient is φ = 27650016.

The previous prime is 28034113. The next prime is 28034129. The reversal of 28034117 is 71143082.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6791236 + 21242881 = 2606^2 + 4609^2 .

It is a cyclic number.

It is not a de Polignac number, because 28034117 - 2² = 28034113 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28034113) 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, 191942 + ... + 192087.

It is an arithmetic number, because the mean of its divisors is an integer number (7104555).

Almost surely, 2^28034117 is an apocalyptic number.

It is an amenable number.

28034117 is a deficient number, since it is larger than the sum of its proper divisors (384103).

28034117 is an equidigital number, since it uses as much as digits as its factorization.

28034117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384102.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 28034117 is about 5294.7253942013. The cubic root of 28034117 is about 303.7821796364.

Adding to 28034117 its reverse (71143082), we get a palindrome (99177199).

The spelling of 28034117 in words is "twenty-eight million, thirty-four thousand, one hundred seventeen".