2371840 has 72 divisors (see below), whose sum is σ = 6070680. Its totient is φ = 884736.

The previous prime is 2371819. The next prime is 2371847. The reversal of 2371840 is 481732.

It can be written as a sum of positive squares in 4 ways, for example, as 692224 + 1679616 = 832^2 + 1296^2 .

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (2371847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21706 + ... + 21814.

It is an arithmetic number, because the mean of its divisors is an integer number (84315).

2^2371840 is an apocalyptic number.

2371840 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 2371840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3035340).

2371840 is an abundant number, since it is smaller than the sum of its proper divisors (3698840).

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

2371840 is a wasteful number, since it uses less digits than its factorization.

2371840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147 (or 133 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 2371840 is about 1540.0779201066. The cubic root of 2371840 is about 133.3608831960.

The spelling of 2371840 in words is "two million, three hundred seventy-one thousand, eight hundred forty".