1340943487840 has 48 divisors (see below), whose sum is σ = 3455977084560. Its totient is φ = 487615813120.

The previous prime is 1340943487813. The next prime is 1340943487841. The reversal of 1340943487840 is 487843490431.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340943487841) 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, 380948095 + ... + 380951614.

It is an arithmetic number, because the mean of its divisors is an integer number (71999522595).

Almost surely, 2^{1340943487840} is an apocalyptic number.

1340943487840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1340943487840 is an abundant number, since it is smaller than the sum of its proper divisors (2115033596720).

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

1340943487840 is a wasteful number, since it uses less digits than its factorization.

1340943487840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 761899735 (or 761899727 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 55.

The spelling of 1340943487840 in words is "one trillion, three hundred forty billion, nine hundred forty-three million, four hundred eighty-seven thousand, eight hundred forty".