2180944 has 10 divisors (see below), whose sum is σ = 4225610. Its totient is φ = 1090464.

The previous prime is 2180923. The next prime is 2180957. The reversal of 2180944 is 4490812.

It can be written as a sum of positive squares in only one way, i.e., 1392400 + 788544 = 1180^2 + 888^2 .

It is a super-2 number, since 2×2180944² = 9513033462272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68139 + ... + 68170.

It is an arithmetic number, because the mean of its divisors is an integer number (422561).

2^2180944 is an apocalyptic number.

It is an amenable number.

2180944 is a deficient number, since it is larger than the sum of its proper divisors (2044666).

2180944 is a wasteful number, since it uses less digits than its factorization.

2180944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136317 (or 136311 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 2180944 is about 1476.8019501612. The cubic root of 2180944 is about 129.6825389983.

Subtracting from 2180944 its sum of digits (28), we obtain a triangular number (2180916 = T₂₀₈₈).

The spelling of 2180944 in words is "two million, one hundred eighty thousand, nine hundred forty-four".