1811938896 has 200 divisors, whose sum is σ = 5541877440. Its totient is φ = 570392064.

The previous prime is 1811938837. The next prime is 1811938901. The reversal of 1811938896 is 6988391181.

It is a Harshad number since it is a multiple of its sum of digits (54).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2652571 + ... + 2653253.

Almost surely, 2^1811938896 is an apocalyptic number.

1811938896 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 1811938896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2770938720).

1811938896 is an abundant number, since it is smaller than the sum of its proper divisors (3729938544).

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

1811938896 is a wasteful number, since it uses less digits than its factorization.

1811938896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 815 (or 800 counting only the distinct ones).

The product of its digits is 746496, while the sum is 54.

The square root of 1811938896 is about 42566.8755724448. The cubic root of 1811938896 is about 1219.1239110243.

The spelling of 1811938896 in words is "one billion, eight hundred eleven million, nine hundred thirty-eight thousand, eight hundred ninety-six".