1813158 has 16 divisors (see below), whose sum is σ = 4029360. Its totient is φ = 604368.

The previous prime is 1813157. The next prime is 1813177. The reversal of 1813158 is 8513181.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1813157) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16735 + ... + 16842.

It is an arithmetic number, because the mean of its divisors is an integer number (251835).

2^1813158 is an apocalyptic number.

1813158 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1813158 is an abundant number, since it is smaller than the sum of its proper divisors (2216202).

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

1813158 is a wasteful number, since it uses less digits than its factorization.

1813158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33588 (or 33582 counting only the distinct ones).

The product of its digits is 960, while the sum is 27.

The square root of 1813158 is about 1346.5355546735. The cubic root of 1813158 is about 121.9397265650.

The spelling of 1813158 in words is "one million, eight hundred thirteen thousand, one hundred fifty-eight".