1816036040 has 192 divisors, whose sum is σ = 5157250560. Its totient is φ = 570447360.

The previous prime is 1816036021. The next prime is 1816036049. The reversal of 1816036040 is 406306181.

It is a junction number, because it is equal to n+sod(n) for n = 1816035994 and 1816036012.

It is not an unprimeable number, because it can be changed into a prime (1816036049) 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, 6701105 + ... + 6701375.

It is an arithmetic number, because the mean of its divisors is an integer number (26860680).

Almost surely, 2^1816036040 is an apocalyptic number.

1816036040 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 1816036040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2578625280).

1816036040 is an abundant number, since it is smaller than the sum of its proper divisors (3341214520).

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

1816036040 is a wasteful number, since it uses less digits than its factorization.

1816036040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572 (or 561 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 1816036040 is about 42614.9743634793. The cubic root of 1816036040 is about 1220.0421108818.

The spelling of 1816036040 in words is "one billion, eight hundred sixteen million, thirty-six thousand, forty".