1340437818 has 16 divisors (see below), whose sum is σ = 2681523360. Its totient is φ = 446704656.

The previous prime is 1340437807. The next prime is 1340437843. The reversal of 1340437818 is 8187340431.

It is a super-2 number, since 2×1340437818² = 3593547087849202248, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2373 + ... + 51831.

It is an arithmetic number, because the mean of its divisors is an integer number (167595210).

Almost surely, 2^1340437818 is an apocalyptic number.

1340437818 is an abundant number, since it is smaller than the sum of its proper divisors (1341085542).

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

1340437818 is a wasteful number, since it uses less digits than its factorization.

1340437818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53981.

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 1340437818 is about 36611.9900852166. The cubic root of 1340437818 is about 1102.5938287388.

The spelling of 1340437818 in words is "one billion, three hundred forty million, four hundred thirty-seven thousand, eight hundred eighteen".