1340454436 has 6 divisors (see below), whose sum is σ = 2345795270. Its totient is φ = 670227216.

The previous prime is 1340454431. The next prime is 1340454439. The reversal of 1340454436 is 6344540431.

It can be written as a sum of positive squares in only one way, i.e., 788486400 + 551968036 = 28080^2 + 23494^2 .

It is not an unprimeable number, because it can be changed into a prime (1340454431) 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 as a sum of consecutive naturals, namely, 167556801 + ... + 167556808.

Almost surely, 2^1340454436 is an apocalyptic number.

It is an amenable number.

1340454436 is a deficient number, since it is larger than the sum of its proper divisors (1005340834).

1340454436 is a wasteful number, since it uses less digits than its factorization.

1340454436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335113613 (or 335113611 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 34.

The square root of 1340454436 is about 36612.2170320236. The cubic root of 1340454436 is about 1102.5983851677.

Adding to 1340454436 its reverse (6344540431), we get a palindrome (7684994867).

The spelling of 1340454436 in words is "one billion, three hundred forty million, four hundred fifty-four thousand, four hundred thirty-six".