2403664 has 20 divisors (see below), whose sum is σ = 4931604. Its totient is φ = 1131008.

The previous prime is 2403659. The next prime is 2403673. The reversal of 2403664 is 4663042.

It can be written as a sum of positive squares in 2 ways, for example, as 2250000 + 153664 = 1500^2 + 392^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4147 + ... + 4690.

2^2403664 is an apocalyptic number.

It is an amenable number.

2403664 is an abundant number, since it is smaller than the sum of its proper divisors (2527940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2403664 is a wasteful number, since it uses less digits than its factorization.

2403664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8862 (or 8856 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 2403664 is about 1550.3754384019. The cubic root of 2403664 is about 133.9546887715.

The spelling of 2403664 in words is "two million, four hundred three thousand, six hundred sixty-four".