1813189376 has 72 divisors (see below), whose sum is σ = 3735687984. Its totient is φ = 877916160.

The previous prime is 1813189369. The next prime is 1813189381. The reversal of 1813189376 is 6739813181.

It is a self number, because there is not a number n which added to its sum of digits gives 1813189376.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1045406 + ... + 1047138.

Almost surely, 2^1813189376 is an apocalyptic number.

1813189376 is a gapful number since it is divisible by the number (16) 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 1813189376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1867843992).

1813189376 is an abundant number, since it is smaller than the sum of its proper divisors (1922498608).

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

1813189376 is an equidigital number, since it uses as much as digits as its factorization.

1813189376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1877 (or 1863 counting only the distinct ones).

The product of its digits is 217728, while the sum is 47.

The square root of 1813189376 is about 42581.5614556348. The cubic root of 1813189376 is about 1219.4042993430.

The spelling of 1813189376 in words is "one billion, eight hundred thirteen million, one hundred eighty-nine thousand, three hundred seventy-six".