2347840 has 112 divisors (see below), whose sum is σ = 6583680. Its totient is φ = 788480.

The previous prime is 2347837. The next prime is 2347841. The reversal of 2347840 is 487432.

2347840 = 179² + 180² + ... + 233².

It is a junction number, because it is equal to n+sod(n) for n = 2347799 and 2347808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2347841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80946 + ... + 80974.

2^2347840 is an apocalyptic number.

2347840 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 2347840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3291840).

2347840 is an abundant number, since it is smaller than the sum of its proper divisors (4235840).

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

2347840 is a wasteful number, since it uses less digits than its factorization.

2347840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80 (or 70 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 2347840 is about 1532.2662953939. The cubic root of 2347840 is about 132.9095433312.

The spelling of 2347840 in words is "two million, three hundred forty-seven thousand, eight hundred forty".