28900769 has 4 divisors (see below), whose sum is σ = 28920240. Its totient is φ = 28881300.

The previous prime is 28900759. The next prime is 28900771. The reversal of 28900769 is 96700982.

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-28900769 is a prime.

It is a super-2 number, since 2×28900769² = 1670508897582722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28900709) 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, 7307 + ... + 10544.

It is an arithmetic number, because the mean of its divisors is an integer number (7230060).

Almost surely, 2^28900769 is an apocalyptic number.

It is an amenable number.

28900769 is a deficient number, since it is larger than the sum of its proper divisors (19471).

28900769 is a wasteful number, since it uses less digits than its factorization.

28900769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19470.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 28900769 is about 5375.9435450905. The cubic root of 28900769 is about 306.8808578986.

The spelling of 28900769 in words is "twenty-eight million, nine hundred thousand, seven hundred sixty-nine".