1819227240 has 192 divisors, whose sum is σ = 6081566400. Its totient is φ = 471453696.

The previous prime is 1819227191. The next prime is 1819227269. The reversal of 1819227240 is 427229181.

1819227240 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1819227195 and 1819227204.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2059839 + ... + 2060721.

It is an arithmetic number, because the mean of its divisors is an integer number (31674825).

Almost surely, 2^1819227240 is an apocalyptic number.

1819227240 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 1819227240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3040783200).

1819227240 is an abundant number, since it is smaller than the sum of its proper divisors (4262339160).

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

1819227240 is a wasteful number, since it uses less digits than its factorization.

1819227240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1056 (or 1049 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 1819227240 is about 42652.4001669308. The cubic root of 1819227240 is about 1220.7563257955.

The spelling of 1819227240 in words is "one billion, eight hundred nineteen million, two hundred twenty-seven thousand, two hundred forty".