2158240 has 96 divisors (see below), whose sum is σ = 6096384. Its totient is φ = 706560.

The previous prime is 2158237. The next prime is 2158259. The reversal of 2158240 is 428512.

It is a plaindrome in base 11.

It is a zygodrome in base 3.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45897 + ... + 45943.

It is an arithmetic number, because the mean of its divisors is an integer number (63504).

2^2158240 is an apocalyptic number.

2158240 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 2158240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3048192).

2158240 is an abundant number, since it is smaller than the sum of its proper divisors (3938144).

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

2158240 is a wasteful number, since it uses less digits than its factorization.

2158240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110 (or 102 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 2158240 is about 1469.0949594904. The cubic root of 2158240 is about 129.2309625557.

The spelling of 2158240 in words is "two million, one hundred fifty-eight thousand, two hundred forty".