28496789 has 4 divisors (see below), whose sum is σ = 29996640. Its totient is φ = 26996940.

The previous prime is 28496779. The next prime is 28496813. The reversal of 28496789 is 98769482.

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-28496789 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28496789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28496729) 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, 749897 + ... + 749934.

It is an arithmetic number, because the mean of its divisors is an integer number (7499160).

Almost surely, 2^28496789 is an apocalyptic number.

It is an amenable number.

28496789 is a deficient number, since it is larger than the sum of its proper divisors (1499851).

28496789 is a wasteful number, since it uses less digits than its factorization.

28496789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1499850.

The product of its digits is 1741824, while the sum is 53.

The square root of 28496789 is about 5338.2383798403. The cubic root of 28496789 is about 305.4442652237. Note that the first 3 decimals are identical.

The spelling of 28496789 in words is "twenty-eight million, four hundred ninety-six thousand, seven hundred eighty-nine".