1343085840 has 80 divisors (see below), whose sum is σ = 4626192000. Its totient is φ = 358155648.

The previous prime is 1343085839. The next prime is 1343085847. The reversal of 1343085840 is 485803431.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1343085795 and 1343085804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1343085847) 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, 308740 + ... + 313059.

It is an arithmetic number, because the mean of its divisors is an integer number (57827400).

Almost surely, 2^1343085840 is an apocalyptic number.

1343085840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1343085840 is an abundant number, since it is smaller than the sum of its proper divisors (3283106160).

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

1343085840 is a wasteful number, since it uses less digits than its factorization.

1343085840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621821 (or 621809 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 1343085840 is about 36648.1355596707. The cubic root of 1343085840 is about 1103.3194056549.

The spelling of 1343085840 in words is "one billion, three hundred forty-three million, eighty-five thousand, eight hundred forty".