1340668820 has 24 divisors (see below), whose sum is σ = 2816558304. Its totient is φ = 536047776.

The previous prime is 1340668817. The next prime is 1340668883. The reversal of 1340668820 is 288660431.

It is a happy number.

It is a congruent number.

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, 41759 + ... + 66521.

It is an arithmetic number, because the mean of its divisors is an integer number (117356596).

Almost surely, 2^1340668820 is an apocalyptic number.

1340668820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1340668820 is an abundant number, since it is smaller than the sum of its proper divisors (1475889484).

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

1340668820 is a wasteful number, since it uses less digits than its factorization.

1340668820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27479 (or 27477 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 1340668820 is about 36615.1446808558. The cubic root of 1340668820 is about 1102.6571629586.

The spelling of 1340668820 in words is "one billion, three hundred forty million, six hundred sixty-eight thousand, eight hundred twenty".