1340343450 has 120 divisors (see below), whose sum is σ = 3747654108. Its totient is φ = 355173120.

The previous prime is 1340343421. The next prime is 1340343479. The reversal of 1340343450 is 543430431.

It is an interprime number because it is at equal distance from previous prime (1340343421) and next prime (1340343479).

It can be written as a sum of positive squares in 6 ways, for example, as 1056185001 + 284158449 = 32499^2 + 16857^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 699694 + ... + 701606.

Almost surely, 2^1340343450 is an apocalyptic number.

1340343450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1340343450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1873827054).

1340343450 is an abundant number, since it is smaller than the sum of its proper divisors (2407310658).

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

1340343450 is a wasteful number, since it uses less digits than its factorization.

1340343450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2110 (or 2096 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

The square root of 1340343450 is about 36610.7013044001. The cubic root of 1340343450 is about 1102.5679536069.

Adding to 1340343450 its reverse (543430431), we get a palindrome (1883773881).

The spelling of 1340343450 in words is "one billion, three hundred forty million, three hundred forty-three thousand, four hundred fifty".