1818478872 has 192 divisors, whose sum is σ = 5896800000. Its totient is φ = 495274752.

The previous prime is 1818478861. The next prime is 1818478873. The reversal of 1818478872 is 2788748181.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1818478873) 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, 1212379 + ... + 1213877.

It is an arithmetic number, because the mean of its divisors is an integer number (30712500).

Almost surely, 2^1818478872 is an apocalyptic number.

1818478872 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 1818478872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2948400000).

1818478872 is an abundant number, since it is smaller than the sum of its proper divisors (4078321128).

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

1818478872 is a wasteful number, since it uses less digits than its factorization.

1818478872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1630 (or 1623 counting only the distinct ones).

The product of its digits is 1605632, while the sum is 54.

The square root of 1818478872 is about 42643.6263936359. The cubic root of 1818478872 is about 1220.5889103403.

It can be divided in two parts, 1818 and 478872, that added together give a triangular number (480690 = T₉₈₀).

The spelling of 1818478872 in words is "one billion, eight hundred eighteen million, four hundred seventy-eight thousand, eight hundred seventy-two".