2117782740 has 24 divisors (see below), whose sum is σ = 5929791840. Its totient is φ = 564742048.

The previous prime is 2117782663. The next prime is 2117782741. The reversal of 2117782740 is 472877112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2117782741) 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, 17648130 + ... + 17648249.

It is an arithmetic number, because the mean of its divisors is an integer number (247074660).

Almost surely, 2^2117782740 is an apocalyptic number.

2117782740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2117782740 is an abundant number, since it is smaller than the sum of its proper divisors (3812009100).

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

2117782740 is a wasteful number, since it uses less digits than its factorization.

2117782740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35296391 (or 35296389 counting only the distinct ones).

The product of its (nonzero) digits is 43904, while the sum is 39.

The square root of 2117782740 is about 46019.3735289823. The cubic root of 2117782740 is about 1284.1836457660.

The spelling of 2117782740 in words is "two billion, one hundred seventeen million, seven hundred eighty-two thousand, seven hundred forty".