2158436 has 24 divisors (see below), whose sum is σ = 4353216. Its totient is φ = 917280.

The previous prime is 2158433. The next prime is 2158447. The reversal of 2158436 is 6348512.

2158436 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 = 2158399 and 2158408.

It is not an unprimeable number, because it can be changed into a prime (2158433) 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, 4151 + ... + 4641.

It is an arithmetic number, because the mean of its divisors is an integer number (181384).

2^2158436 is an apocalyptic number.

It is an amenable number.

2158436 is an abundant number, since it is smaller than the sum of its proper divisors (2194780).

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

2158436 is a wasteful number, since it uses less digits than its factorization.

2158436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659 (or 657 counting only the distinct ones).

The product of its digits is 5760, while the sum is 29.

The square root of 2158436 is about 1469.1616657128. The cubic root of 2158436 is about 129.2348744626.

The spelling of 2158436 in words is "two million, one hundred fifty-eight thousand, four hundred thirty-six".