1812357120 has 448 divisors, whose sum is σ = 6920179200. Its totient is φ = 404619264.

The previous prime is 1812357073. The next prime is 1812357121. The reversal of 1812357120 is 217532181.

It is a tau number, because it is divible by the number of its divisors (448).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1812357121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42147819 + ... + 42147861.

Almost surely, 2^1812357120 is an apocalyptic number.

1812357120 is a gapful number since it is divisible by the number (10) 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 1812357120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3460089600).

1812357120 is an abundant number, since it is smaller than the sum of its proper divisors (5107822080).

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

1812357120 is an frugal number, since it uses more digits than its factorization.

1812357120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98 (or 60 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 1812357120 is about 42571.7878412453. The cubic root of 1812357120 is about 1219.2177014673.

The spelling of 1812357120 in words is "one billion, eight hundred twelve million, three hundred fifty-seven thousand, one hundred twenty".