2185677728 has 24 divisors (see below), whose sum is σ = 4634057988. Its totient is φ = 1008774144.

The previous prime is 2185677721. The next prime is 2185677751. The reversal of 2185677728 is 8277765812.

It can be written as a sum of positive squares in 2 ways, for example, as 1728231184 + 457446544 = 41572^2 + 21388^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2185677728.

It is not an unprimeable number, because it can be changed into a prime (2185677721) 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, 2626601 + ... + 2627432.

Almost surely, 2^2185677728 is an apocalyptic number.

It is an amenable number.

2185677728 is an abundant number, since it is smaller than the sum of its proper divisors (2448380260).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2185677728 is a wasteful number, since it uses less digits than its factorization.

2185677728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5254056 (or 5254048 counting only the distinct ones).

The product of its digits is 2634240, while the sum is 53.

The square root of 2185677728 is about 46751.2323687836. The cubic root of 2185677728 is about 1297.7629629763.

The spelling of 2185677728 in words is "two billion, one hundred eighty-five million, six hundred seventy-seven thousand, seven hundred twenty-eight".