2166047240 has 64 divisors (see below), whose sum is σ = 5646188160. Its totient is φ = 732464640.

The previous prime is 2166047189. The next prime is 2166047243. The reversal of 2166047240 is 427406612.

It is a junction number, because it is equal to n+sod(n) for n = 2166047197 and 2166047206.

It is not an unprimeable number, because it can be changed into a prime (2166047243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32546 + ... + 73425.

It is an arithmetic number, because the mean of its divisors is an integer number (88221690).

Almost surely, 2^2166047240 is an apocalyptic number.

2166047240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2166047240 is an abundant number, since it is smaller than the sum of its proper divisors (3480140920).

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

2166047240 is a wasteful number, since it uses less digits than its factorization.

2166047240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106062 (or 106058 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 2166047240 is about 46540.8126271985. The cubic root of 2166047240 is about 1293.8660218167.

The spelling of 2166047240 in words is "two billion, one hundred sixty-six million, forty-seven thousand, two hundred forty".