1340443433 has 8 divisors (see below), whose sum is σ = 1532203968. Its totient is φ = 1148750064.

The previous prime is 1340443397. The next prime is 1340443439. The reversal of 1340443433 is 3343440431.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1340443433 - 2²² = 1336249129 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1340443396 and 1340443405.

It is not an unprimeable number, because it can be changed into a prime (1340443439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37835 + ... + 64127.

It is an arithmetic number, because the mean of its divisors is an integer number (191525496).

Almost surely, 2^1340443433 is an apocalyptic number.

It is an amenable number.

1340443433 is a deficient number, since it is larger than the sum of its proper divisors (191760535).

1340443433 is an equidigital number, since it uses as much as digits as its factorization.

1340443433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33583.

The product of its (nonzero) digits is 20736, while the sum is 29.

The square root of 1340443433 is about 36612.0667676655. The cubic root of 1340443433 is about 1102.5953682994.

Adding to 1340443433 its reverse (3343440431), we get a palindrome (4683883864).

The spelling of 1340443433 in words is "one billion, three hundred forty million, four hundred forty-three thousand, four hundred thirty-three".