2180439 has 16 divisors (see below), whose sum is σ = 3273440. Its totient is φ = 1452168.

The previous prime is 2180417. The next prime is 2180467. The reversal of 2180439 is 9340812.

It is not a de Polignac number, because 2180439 - 2⁸ = 2180183 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is a Duffinian number.

2180439 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2180039) 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, 1689 + ... + 2685.

It is an arithmetic number, because the mean of its divisors is an integer number (204590).

2^2180439 is an apocalyptic number.

2180439 is a deficient number, since it is larger than the sum of its proper divisors (1093001).

2180439 is an frugal number, since it uses more digits than its factorization.

2180439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018 (or 1000 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 2180439 is about 1476.6309626985. The cubic root of 2180439 is about 129.6725288471.

The spelling of 2180439 in words is "two million, one hundred eighty thousand, four hundred thirty-nine".