2173940 has 24 divisors (see below), whose sum is σ = 4630920. Its totient is φ = 857088.

The previous prime is 2173907. The next prime is 2173957. The reversal of 2173940 is 493712.

2173940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 88804 + 2085136 = 298^2 + 1444^2 .

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 716 + ... + 2204.

It is an arithmetic number, because the mean of its divisors is an integer number (192955).

2^2173940 is an apocalyptic number.

2173940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2173940 is an abundant number, since it is smaller than the sum of its proper divisors (2456980).

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

2173940 is a wasteful number, since it uses less digits than its factorization.

2173940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1571 (or 1569 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 2173940 is about 1474.4287029219. The cubic root of 2173940 is about 129.5435669815.

It can be divided in two parts, 2173 and 940, that added together give a palindrome (3113).

The spelling of 2173940 in words is "two million, one hundred seventy-three thousand, nine hundred forty".