1818042492 has 144 divisors (see below), whose sum is σ = 5394428928. Its totient is φ = 473034240.

The previous prime is 1818042491. The next prime is 1818042529. The reversal of 1818042492 is 2942408181.

It is a self number, because there is not a number n which added to its sum of digits gives 1818042492.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1818042491) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 306943 + ... + 312809.

It is an arithmetic number, because the mean of its divisors is an integer number (37461312).

Almost surely, 2^1818042492 is an apocalyptic number.

1818042492 is a gapful number since it is divisible by the number (12) 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 1818042492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2697214464).

1818042492 is an abundant number, since it is smaller than the sum of its proper divisors (3576386436).

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

1818042492 is a wasteful number, since it uses less digits than its factorization.

1818042492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5936 (or 5927 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 39.

The square root of 1818042492 is about 42638.5094955253. The cubic root of 1818042492 is about 1220.4912677064.

The spelling of 1818042492 in words is "one billion, eight hundred eighteen million, forty-two thousand, four hundred ninety-two".