28344707 has 4 divisors (see below), whose sum is σ = 28383600. Its totient is φ = 28305816.

The previous prime is 28344689. The next prime is 28344709. The reversal of 28344707 is 70744382.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70744382 = 2 ⋅35372191.

It is a cyclic number.

It is not a de Polignac number, because 28344707 - 2⁸ = 28344451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28344709) 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, 18332 + ... + 19817.

It is an arithmetic number, because the mean of its divisors is an integer number (7095900).

Almost surely, 2^28344707 is an apocalyptic number.

28344707 is a deficient number, since it is larger than the sum of its proper divisors (38893).

28344707 is an equidigital number, since it uses as much as digits as its factorization.

28344707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38892.

The product of its (nonzero) digits is 37632, while the sum is 35.

The square root of 28344707 is about 5323.9747369799. The cubic root of 28344707 is about 304.8999295462.

The spelling of 28344707 in words is "twenty-eight million, three hundred forty-four thousand, seven hundred seven".