2663944 has 8 divisors (see below), whose sum is σ = 4994910. Its totient is φ = 1331968.

The previous prime is 2663897. The next prime is 2663953. The reversal of 2663944 is 4493662.

2663944 is nontrivially palindromic in base 7.

It can be written as a sum of positive squares in only one way, i.e., 1368900 + 1295044 = 1170^2 + 1138^2 .

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

It is an unprimeable number.

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, 166489 + ... + 166504.

2^2663944 is an apocalyptic number.

It is an amenable number.

2663944 is a deficient number, since it is larger than the sum of its proper divisors (2330966).

2663944 is a wasteful number, since it uses less digits than its factorization.

2663944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332999 (or 332995 counting only the distinct ones).

The product of its digits is 31104, while the sum is 34.

The square root of 2663944 is about 1632.1593059502. The cubic root of 2663944 is about 138.6250440083.

The spelling of 2663944 in words is "two million, six hundred sixty-three thousand, nine hundred forty-four".