2207640 has 32 divisors (see below), whose sum is σ = 6623280. Its totient is φ = 588672.

The previous prime is 2207633. The next prime is 2207677. The reversal of 2207640 is 467022.

It is a happy number.

2207640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9079 + ... + 9318.

2^2207640 is an apocalyptic number.

2207640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2207640 is an abundant number, since it is smaller than the sum of its proper divisors (4415640).

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

2207640 is a wasteful number, since it uses less digits than its factorization.

2207640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18411 (or 18407 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 2207640 is about 1485.8129088146. The cubic root of 2207640 is about 130.2095240567.

The spelling of 2207640 in words is "two million, two hundred seven thousand, six hundred forty".