2158420 has 24 divisors (see below), whose sum is σ = 4945248. Its totient is φ = 784800.

The previous prime is 2158393. The next prime is 2158423. The reversal of 2158420 is 248512.

2158420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 2158391 and 2158400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2158423) by changing a digit.

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, 4686 + ... + 5125.

It is an arithmetic number, because the mean of its divisors is an integer number (206052).

2^2158420 is an apocalyptic number.

2158420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2158420 is an abundant number, since it is smaller than the sum of its proper divisors (2786828).

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

2158420 is a wasteful number, since it uses less digits than its factorization.

2158420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9831 (or 9829 counting only the distinct ones).

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

The square root of 2158420 is about 1469.1562204204. The cubic root of 2158420 is about 129.2345551321.

The spelling of 2158420 in words is "two million, one hundred fifty-eight thousand, four hundred twenty".