1816002040 has 32 divisors (see below), whose sum is σ = 4226904000. Its totient is φ = 701352064.

The previous prime is 1816002029. The next prime is 1816002047. The reversal of 1816002040 is 402006181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1816002047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 781600 + ... + 783919.

It is an arithmetic number, because the mean of its divisors is an integer number (132090750).

Almost surely, 2^1816002040 is an apocalyptic number.

1816002040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1816002040 is an abundant number, since it is smaller than the sum of its proper divisors (2410901960).

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

1816002040 is a wasteful number, since it uses less digits than its factorization.

1816002040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1565559 (or 1565555 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 1816002040 is about 42614.5754408043. The cubic root of 1816002040 is about 1220.0344969194.

The spelling of 1816002040 in words is "one billion, eight hundred sixteen million, two thousand, forty".