2173980 has 48 divisors (see below), whose sum is σ = 6410880. Its totient is φ = 548928.

The previous prime is 2173967. The next prime is 2173981. The reversal of 2173980 is 893712.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2173981) 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, 187 + ... + 2093.

It is an arithmetic number, because the mean of its divisors is an integer number (133560).

2^2173980 is an apocalyptic number.

2173980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2173980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3205440).

2173980 is an abundant number, since it is smaller than the sum of its proper divisors (4236900).

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

2173980 is a wasteful number, since it uses less digits than its factorization.

2173980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1938 (or 1936 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 2173980 is about 1474.4422674354. The cubic root of 2173980 is about 129.5443615006.

The spelling of 2173980 in words is "two million, one hundred seventy-three thousand, nine hundred eighty".