2171380 has 24 divisors (see below), whose sum is σ = 4596480. Its totient is φ = 861600.

The previous prime is 2171347. The next prime is 2171383. The reversal of 2171380 is 831712.

It is a super-2 number, since 2×2171380² = 9429782208800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2171383) 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, 2661 + ... + 3379.

It is an arithmetic number, because the mean of its divisors is an integer number (191520).

2^2171380 is an apocalyptic number.

2171380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2171380 is an abundant number, since it is smaller than the sum of its proper divisors (2425100).

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

2171380 is a wasteful number, since it uses less digits than its factorization.

2171380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879 (or 877 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 2171380 is about 1473.5603143407. The cubic root of 2171380 is about 129.4926974709.

The spelling of 2171380 in words is "two million, one hundred seventy-one thousand, three hundred eighty".