2307840 has 72 divisors (see below), whose sum is σ = 7382928. Its totient is φ = 614400.

The previous prime is 2307821. The next prime is 2307863. The reversal of 2307840 is 487032.

It is a super-2 number, since 2×2307840² = 10652250931200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 2307840.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3540 + ... + 4140.

2^2307840 is an apocalyptic number.

2307840 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 2307840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3691464).

2307840 is an abundant number, since it is smaller than the sum of its proper divisors (5075088).

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

2307840 is an equidigital number, since it uses as much as digits as its factorization.

2307840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625 (or 611 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 2307840 is about 1519.1576613374. The cubic root of 2307840 is about 132.1504253900.

The spelling of 2307840 in words is "two million, three hundred seven thousand, eight hundred forty".