2865605380 has 24 divisors (see below), whose sum is σ = 6564841920. Its totient is φ = 1042038240.

The previous prime is 2865605371. The next prime is 2865605383. The reversal of 2865605380 is 835065682.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2865605383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6512520 + ... + 6512959.

It is an arithmetic number, because the mean of its divisors is an integer number (273535080).

Almost surely, 2^2865605380 is an apocalyptic number.

2865605380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2865605380 is an abundant number, since it is smaller than the sum of its proper divisors (3699236540).

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

2865605380 is a wasteful number, since it uses less digits than its factorization.

2865605380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13025499 (or 13025497 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 43.

The square root of 2865605380 is about 53531.3495066209. The cubic root of 2865605380 is about 1420.3829853694.

The spelling of 2865605380 in words is "two billion, eight hundred sixty-five million, six hundred five thousand, three hundred eighty".