2403944 has 8 divisors (see below), whose sum is σ = 4507410. Its totient is φ = 1201968.

The previous prime is 2403941. The next prime is 2403959. The reversal of 2403944 is 4493042.

It can be written as a sum of positive squares in only one way, i.e., 2402500 + 1444 = 1550^2 + 38^2 .

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 (2403941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 150239 + ... + 150254.

2^2403944 is an apocalyptic number.

It is an amenable number.

2403944 is a deficient number, since it is larger than the sum of its proper divisors (2103466).

2403944 is a wasteful number, since it uses less digits than its factorization.

2403944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300499 (or 300495 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 2403944 is about 1550.4657364805. The cubic root of 2403944 is about 133.9598899777.

Adding to 2403944 its reverse (4493042), we get a palindrome (6896986).

The spelling of 2403944 in words is "two million, four hundred three thousand, nine hundred forty-four".