2604440 has 16 divisors (see below), whose sum is σ = 5860080. Its totient is φ = 1041760.

The previous prime is 2604439. The next prime is 2604499. The reversal of 2604440 is 444062.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32516 + ... + 32595.

It is an arithmetic number, because the mean of its divisors is an integer number (366255).

2^2604440 is an apocalyptic number.

2604440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2604440 is an abundant number, since it is smaller than the sum of its proper divisors (3255640).

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

2604440 is a wasteful number, since it uses less digits than its factorization.

2604440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65122 (or 65118 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 2604440 is about 1613.8277479335. The cubic root of 2604440 is about 137.5851153450.

The spelling of 2604440 in words is "two million, six hundred four thousand, four hundred forty".