2388640 has 24 divisors (see below), whose sum is σ = 5643540. Its totient is φ = 955392.

The previous prime is 2388637. The next prime is 2388641. The reversal of 2388640 is 468832.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2347024 + 41616 = 1532^2 + 204^2 .

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2388641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7305 + ... + 7624.

2^2388640 is an apocalyptic number.

2388640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2388640 is an abundant number, since it is smaller than the sum of its proper divisors (3254900).

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

2388640 is a wasteful number, since it uses less digits than its factorization.

2388640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14944 (or 14936 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 2388640 is about 1545.5225653480. The cubic root of 2388640 is about 133.6750125558.

The spelling of 2388640 in words is "two million, three hundred eighty-eight thousand, six hundred forty".