28813607 has 4 divisors (see below), whose sum is σ = 28943040. Its totient is φ = 28684176.

The previous prime is 28813597. The next prime is 28813621. The reversal of 28813607 is 70631882.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28813607 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 (28813627) 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, 64382 + ... + 64827.

It is an arithmetic number, because the mean of its divisors is an integer number (7235760).

Almost surely, 2^28813607 is an apocalyptic number.

28813607 is a deficient number, since it is larger than the sum of its proper divisors (129433).

28813607 is a wasteful number, since it uses less digits than its factorization.

28813607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129432.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 28813607 is about 5367.8307536658. The cubic root of 28813607 is about 306.5720393033.

The spelling of 28813607 in words is "twenty-eight million, eight hundred thirteen thousand, six hundred seven".