28892693 has 4 divisors (see below), whose sum is σ = 29217420. Its totient is φ = 28567968.

The previous prime is 28892681. The next prime is 28892719. The reversal of 28892693 is 39629882.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9690769 + 19201924 = 3113^2 + 4382^2 .

It is a cyclic number.

It is not a de Polignac number, because 28892693 - 2⁶ = 28892629 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 (28892653) 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, 162230 + ... + 162407.

It is an arithmetic number, because the mean of its divisors is an integer number (7304355).

Almost surely, 2^28892693 is an apocalyptic number.

It is an amenable number.

28892693 is a deficient number, since it is larger than the sum of its proper divisors (324727).

28892693 is an equidigital number, since it uses as much as digits as its factorization.

28892693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324726.

The product of its digits is 373248, while the sum is 47.

The square root of 28892693 is about 5375.1923686506. The cubic root of 28892693 is about 306.8522704159.

The spelling of 28892693 in words is "twenty-eight million, eight hundred ninety-two thousand, six hundred ninety-three".