28213737965 has 32 divisors (see below), whose sum is σ = 40982008320. Its totient is φ = 18202834944.

The previous prime is 28213737947. The next prime is 28213737967. The reversal of 28213737965 is 56973731282.

It is a happy number.

It is not a de Polignac number, because 28213737965 - 2⁶ = 28213737901 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28213737967) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2769401 + ... + 2779569.

It is an arithmetic number, because the mean of its divisors is an integer number (1280687760).

Almost surely, 2^28213737965 is an apocalyptic number.

It is an amenable number.

28213737965 is a deficient number, since it is larger than the sum of its proper divisors (12768270355).

28213737965 is a wasteful number, since it uses less digits than its factorization.

28213737965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14861.

The product of its digits is 3810240, while the sum is 53.

The spelling of 28213737965 in words is "twenty-eight billion, two hundred thirteen million, seven hundred thirty-seven thousand, nine hundred sixty-five".