2309881506 has 16 divisors (see below), whose sum is σ = 4698064800. Its totient is φ = 756910208.

The previous prime is 2309881489. The next prime is 2309881507. The reversal of 2309881506 is 6051889032.

It is not an unprimeable number, because it can be changed into a prime (2309881507) 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, 3262191 + ... + 3262898.

It is an arithmetic number, because the mean of its divisors is an integer number (293629050).

Almost surely, 2^2309881506 is an apocalyptic number.

2309881506 is an abundant number, since it is smaller than the sum of its proper divisors (2388183294).

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

2309881506 is a wasteful number, since it uses less digits than its factorization.

2309881506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6525153.

The product of its (nonzero) digits is 103680, while the sum is 42.

The square root of 2309881506 is about 48061.2266385285. The cubic root of 2309881506 is about 1321.8938048440.

The spelling of 2309881506 in words is "two billion, three hundred nine million, eight hundred eighty-one thousand, five hundred six".