1918158 has 16 divisors (see below), whose sum is σ = 4185216. Its totient is φ = 581240.

The previous prime is 1918157. The next prime is 1918181. The reversal of 1918158 is 8518191.

It is a super-2 number, since 2×1918158² = 7358660225928, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1918151) 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, 14466 + ... + 14597.

It is an arithmetic number, because the mean of its divisors is an integer number (261576).

2^1918158 is an apocalyptic number.

1918158 is an abundant number, since it is smaller than the sum of its proper divisors (2267058).

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

1918158 is a wasteful number, since it uses less digits than its factorization.

1918158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29079.

The product of its digits is 2880, while the sum is 33.

The square root of 1918158 is about 1384.9758120632. The cubic root of 1918158 is about 124.2495408382.

Adding to 1918158 its sum of digits (33), we get a palindrome (1918191).

The spelling of 1918158 in words is "one million, nine hundred eighteen thousand, one hundred fifty-eight".