2171838960 has 80 divisors (see below), whose sum is σ = 7480786080. Its totient is φ = 579156480.

The previous prime is 2171838931. The next prime is 2171838989. The reversal of 2171838960 is 698381712.

It is an interprime number because it is at equal distance from previous prime (2171838931) and next prime (2171838989).

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 500581 + ... + 504900.

It is an arithmetic number, because the mean of its divisors is an integer number (93509826).

Almost surely, 2^2171838960 is an apocalyptic number.

2171838960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2171838960 is an abundant number, since it is smaller than the sum of its proper divisors (5308947120).

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

2171838960 is a wasteful number, since it uses less digits than its factorization.

2171838960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1005503 (or 1005491 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 2171838960 is about 46602.9930369284. The cubic root of 2171838960 is about 1295.0182036071.

The spelling of 2171838960 in words is "two billion, one hundred seventy-one million, eight hundred thirty-eight thousand, nine hundred sixty".