1816414440 has 64 divisors (see below), whose sum is σ = 5736052800. Its totient is φ = 458883072.

The previous prime is 1816414427. The next prime is 1816414441. The reversal of 1816414440 is 444146181.

It is a happy number.

It is a super-2 number, since 2×1816414440² = 6598722835681027200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1816414441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 396057 + ... + 400616.

It is an arithmetic number, because the mean of its divisors is an integer number (89625825).

Almost surely, 2^1816414440 is an apocalyptic number.

1816414440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1816414440 is an abundant number, since it is smaller than the sum of its proper divisors (3919638360).

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

1816414440 is a wasteful number, since it uses less digits than its factorization.

1816414440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796706 (or 796702 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 1816414440 is about 42619.4138861623. The cubic root of 1816414440 is about 1220.1268433914.

The spelling of 1816414440 in words is "one billion, eight hundred sixteen million, four hundred fourteen thousand, four hundred forty".