2117387860 has 48 divisors (see below), whose sum is σ = 5107334400. Its totient is φ = 722304000.

The previous prime is 2117387837. The next prime is 2117387861. The reversal of 2117387860 is 687837112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2117387861) 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, 10141 + ... + 65860.

It is an arithmetic number, because the mean of its divisors is an integer number (106402800).

Almost surely, 2^2117387860 is an apocalyptic number.

2117387860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2117387860 is an abundant number, since it is smaller than the sum of its proper divisors (2989946540).

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

2117387860 is a wasteful number, since it uses less digits than its factorization.

2117387860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76216 (or 76214 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 43.

The square root of 2117387860 is about 46015.0829620028. The cubic root of 2117387860 is about 1284.1038248682.

The spelling of 2117387860 in words is "two billion, one hundred seventeen million, three hundred eighty-seven thousand, eight hundred sixty".