2159740 has 24 divisors (see below), whose sum is σ = 4948272. Its totient is φ = 785280.

The previous prime is 2159719. The next prime is 2159767. The reversal of 2159740 is 479512.

It is a happy number.

2159740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 2159699 and 2159708.

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 7 ways as a sum of consecutive naturals, for example, 4689 + ... + 5128.

It is an arithmetic number, because the mean of its divisors is an integer number (206178).

2^2159740 is an apocalyptic number.

2159740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2159740 is an abundant number, since it is smaller than the sum of its proper divisors (2788532).

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

2159740 is a wasteful number, since it uses less digits than its factorization.

2159740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9837 (or 9835 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 2159740 is about 1469.6053892117. The cubic root of 2159740 is about 129.2608945918.

The spelling of 2159740 in words is "two million, one hundred fifty-nine thousand, seven hundred forty".