1340143236 has 18 divisors (see below), whose sum is σ = 3387584382. Its totient is φ = 446714400.

The previous prime is 1340143229. The next prime is 1340143241. The reversal of 1340143236 is 6323410431.

It can be written as a sum of positive squares in only one way, i.e., 1236225600 + 103917636 = 35160^2 + 10194^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18613065 + ... + 18613136.

Almost surely, 2^1340143236 is an apocalyptic number.

It is an amenable number.

1340143236 is an abundant number, since it is smaller than the sum of its proper divisors (2047441146).

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

1340143236 is a wasteful number, since it uses less digits than its factorization.

1340143236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37226211 (or 37226206 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 1340143236 is about 36607.9668378346. The cubic root of 1340143236 is about 1102.5130521231.

Adding to 1340143236 its reverse (6323410431), we get a palindrome (7663553667).

The spelling of 1340143236 in words is "one billion, three hundred forty million, one hundred forty-three thousand, two hundred thirty-six".