2604240 has 60 divisors (see below), whose sum is σ = 8748324. Its totient is φ = 694272.

The previous prime is 2604227. The next prime is 2604253. The reversal of 2604240 is 424062.

It is an interprime number because it is at equal distance from previous prime (2604227) and next prime (2604253).

It can be written as a sum of positive squares in 2 ways, for example, as 318096 + 2286144 = 564^2 + 1512^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1089 + ... + 2528.

2^2604240 is an apocalyptic number.

2604240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2604240 is an abundant number, since it is smaller than the sum of its proper divisors (6144084).

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

2604240 is a wasteful number, since it uses less digits than its factorization.

2604240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3636 (or 3627 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 2604240 is about 1613.7657822621. The cubic root of 2604240 is about 137.5815934456.

The spelling of 2604240 in words is "two million, six hundred four thousand, two hundred forty".