1818441140 has 12 divisors (see below), whose sum is σ = 3818726436. Its totient is φ = 727376448.

The previous prime is 1818441101. The next prime is 1818441161. The reversal of 1818441140 is 411448181.

It can be written as a sum of positive squares in 2 ways, for example, as 917120656 + 901320484 = 30284^2 + 30022^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1818441097 and 1818441106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45461009 + ... + 45461048.

It is an arithmetic number, because the mean of its divisors is an integer number (318227203).

Almost surely, 2^1818441140 is an apocalyptic number.

1818441140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1818441140 is an abundant number, since it is smaller than the sum of its proper divisors (2000285296).

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

1818441140 is a wasteful number, since it uses less digits than its factorization.

1818441140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90922066 (or 90922064 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 32.

The square root of 1818441140 is about 42643.1839805613. The cubic root of 1818441140 is about 1220.5804681967.

The spelling of 1818441140 in words is "one billion, eight hundred eighteen million, four hundred forty-one thousand, one hundred forty".