28276613 has 8 divisors (see below), whose sum is σ = 29243808. Its totient is φ = 27325584.

The previous prime is 28276609. The next prime is 28276639. The reversal of 28276613 is 31667282.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 28276613 - 2² = 28276609 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 (28276643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 431 + ... + 7532.

It is an arithmetic number, because the mean of its divisors is an integer number (3655476).

Almost surely, 2^28276613 is an apocalyptic number.

It is an amenable number.

28276613 is a deficient number, since it is larger than the sum of its proper divisors (967195).

28276613 is an equidigital number, since it uses as much as digits as its factorization.

28276613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8083.

The product of its digits is 24192, while the sum is 35.

The square root of 28276613 is about 5317.5758574749. The cubic root of 28276613 is about 304.6555746501.

The spelling of 28276613 in words is "twenty-eight million, two hundred seventy-six thousand, six hundred thirteen".