2438640 has 80 divisors (see below), whose sum is σ = 8407200. Its totient is φ = 649728.

The previous prime is 2438629. The next prime is 2438671. The reversal of 2438640 is 468342.

2438640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nialpdrome in base 12.

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 15 ways as a sum of consecutive naturals, for example, 1596 + ... + 2724.

It is an arithmetic number, because the mean of its divisors is an integer number (105090).

2^2438640 is an apocalyptic number.

2438640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2438640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4203600).

2438640 is an abundant number, since it is smaller than the sum of its proper divisors (5968560).

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

2438640 is a wasteful number, since it uses less digits than its factorization.

2438640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1151 (or 1139 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 2438640 is about 1561.6145491126. The cubic root of 2438640 is about 134.6012927583.

The spelling of 2438640 in words is "two million, four hundred thirty-eight thousand, six hundred forty".