28295328965 has 4 divisors (see below), whose sum is σ = 33954394764. Its totient is φ = 22636263168.

The previous prime is 28295328961. The next prime is 28295328983. The reversal of 28295328965 is 56982359282.

It is a happy number.

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 20999777569 + 7295551396 = 144913^2 + 85414^2 .

It is a cyclic number.

It is not a de Polignac number, because 28295328965 - 2² = 28295328961 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 (28295328961) 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, 2829532892 + ... + 2829532901.

It is an arithmetic number, because the mean of its divisors is an integer number (8488598691).

Almost surely, 2^28295328965 is an apocalyptic number.

It is an amenable number.

28295328965 is a deficient number, since it is larger than the sum of its proper divisors (5659065799).

28295328965 is an equidigital number, since it uses as much as digits as its factorization.

28295328965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5659065798.

The product of its digits is 18662400, while the sum is 59.

The spelling of 28295328965 in words is "twenty-eight billion, two hundred ninety-five million, three hundred twenty-eight thousand, nine hundred sixty-five".