28344693 has 8 divisors (see below), whose sum is σ = 40700128. Its totient is φ = 17442864.

The previous prime is 28344689. The next prime is 28344709. The reversal of 28344693 is 39644382.

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

It is not a de Polignac number, because 28344693 - 2² = 28344689 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 726787 = 28344693 / (2 + 8 + 3 + 4 + 4 + 6 + 9 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28344293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 363355 + ... + 363432.

It is an arithmetic number, because the mean of its divisors is an integer number (5087516).

Almost surely, 2^28344693 is an apocalyptic number.

It is an amenable number.

28344693 is a deficient number, since it is larger than the sum of its proper divisors (12355435).

28344693 is a wasteful number, since it uses less digits than its factorization.

28344693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726803.

The product of its digits is 124416, while the sum is 39.

The square root of 28344693 is about 5323.9734221726. The cubic root of 28344693 is about 304.8998793475.

The spelling of 28344693 in words is "twenty-eight million, three hundred forty-four thousand, six hundred ninety-three".