28818693 has 8 divisors (see below), whose sum is σ = 42694400. Its totient is φ = 19212444.

The previous prime is 28818677. The next prime is 28818703. The reversal of 28818693 is 39681882.

It is not a de Polignac number, because 28818693 - 2⁴ = 28818677 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28810693) 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, 533653 + ... + 533706.

It is an arithmetic number, because the mean of its divisors is an integer number (5336800).

Almost surely, 2^28818693 is an apocalyptic number.

It is an amenable number.

28818693 is a deficient number, since it is larger than the sum of its proper divisors (13875707).

28818693 is a wasteful number, since it uses less digits than its factorization.

28818693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1067368 (or 1067362 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 28818693 is about 5368.3044809325. The cubic root of 28818693 is about 306.5900763099.

It can be divided in two parts, 288 and 18693, that added together give a palindrome (18981).

The spelling of 28818693 in words is "twenty-eight million, eight hundred eighteen thousand, six hundred ninety-three".