28029613 has 4 divisors (see below), whose sum is σ = 28291680. Its totient is φ = 27767548.

The previous prime is 28029601. The next prime is 28029623. The reversal of 28029613 is 31692082.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28029613 - 2⁵ = 28029581 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 (28029623) 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, 130873 + ... + 131086.

It is an arithmetic number, because the mean of its divisors is an integer number (7072920).

Almost surely, 2^28029613 is an apocalyptic number.

It is an amenable number.

28029613 is a deficient number, since it is larger than the sum of its proper divisors (262067).

28029613 is a wasteful number, since it uses less digits than its factorization.

28029613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262066.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 28029613 is about 5294.3000481650. The cubic root of 28029613 is about 303.7659100768.

The spelling of 28029613 in words is "twenty-eight million, twenty-nine thousand, six hundred thirteen".