2180392 has 8 divisors (see below), whose sum is σ = 4088250. Its totient is φ = 1090192.

The previous prime is 2180389. The next prime is 2180393. The reversal of 2180392 is 2930812.

It can be written as a sum of positive squares in only one way, i.e., 1359556 + 820836 = 1166^2 + 906^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (2180393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 136267 + ... + 136282.

2^2180392 is an apocalyptic number.

It is an amenable number.

2180392 is a deficient number, since it is larger than the sum of its proper divisors (1907858).

2180392 is a wasteful number, since it uses less digits than its factorization.

2180392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272555 (or 272551 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 2180392 is about 1476.6150480068. The cubic root of 2180392 is about 129.6715971307.

The spelling of 2180392 in words is "two million, one hundred eighty thousand, three hundred ninety-two".