28762393 has 4 divisors (see below), whose sum is σ = 31377168. Its totient is φ = 26147620.

The previous prime is 28762387. The next prime is 28762417. The reversal of 28762393 is 39326782.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28762393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28762373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1307371 + ... + 1307392.

It is an arithmetic number, because the mean of its divisors is an integer number (7844292).

Almost surely, 2^28762393 is an apocalyptic number.

It is an amenable number.

28762393 is a deficient number, since it is larger than the sum of its proper divisors (2614775).

28762393 is a wasteful number, since it uses less digits than its factorization.

28762393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2614774.

The product of its digits is 108864, while the sum is 40.

The square root of 28762393 is about 5363.0581760783. The cubic root of 28762393 is about 306.3902954033.

The spelling of 28762393 in words is "twenty-eight million, seven hundred sixty-two thousand, three hundred ninety-three".