2158156 has 72 divisors (see below), whose sum is σ = 5213600. Its totient is φ = 776160.

The previous prime is 2158147. The next prime is 2158157. The reversal of 2158156 is 6518512.

It is a Harshad number since it is a multiple of its sum of digits (28).

Its product of digits (2400) is a multiple of the sum of its prime factors (60).

It is not an unprimeable number, because it can be changed into a prime (2158157) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 166006 + ... + 166018.

2^2158156 is an apocalyptic number.

2158156 is a gapful number since it is divisible by the number (26) 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 2158156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2606800).

2158156 is an abundant number, since it is smaller than the sum of its proper divisors (3055444).

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

2158156 is a wasteful number, since it uses less digits than its factorization.

2158156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60 (or 33 counting only the distinct ones).

The product of its digits is 2400, while the sum is 28.

The square root of 2158156 is about 1469.0663701821. The cubic root of 2158156 is about 129.2292859516.

2158156 divided by its sum of digits (28) gives a palindrome (77077).

The spelling of 2158156 in words is "two million, one hundred fifty-eight thousand, one hundred fifty-six".