2507640 has 32 divisors (see below), whose sum is σ = 7523280. Its totient is φ = 668672.

The previous prime is 2507629. The next prime is 2507641. The reversal of 2507640 is 467052.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 2507640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2507641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10329 + ... + 10568.

2^2507640 is an apocalyptic number.

2507640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2507640 is an abundant number, since it is smaller than the sum of its proper divisors (5015640).

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

2507640 is a wasteful number, since it uses less digits than its factorization.

2507640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20911 (or 20907 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 2507640 is about 1583.5529672228. The cubic root of 2507640 is about 135.8589945706.

The spelling of 2507640 in words is "two million, five hundred seven thousand, six hundred forty".