1340635436 has 48 divisors (see below), whose sum is σ = 2843491392. Its totient is φ = 539904000.

The previous prime is 1340635411. The next prime is 1340635463. The reversal of 1340635436 is 6345360431.

It is a junction number, because it is equal to n+sod(n) for n = 1340635396 and 1340635405.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 360386 + ... + 364086.

It is an arithmetic number, because the mean of its divisors is an integer number (59239404).

Almost surely, 2^1340635436 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1340635436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1421745696).

1340635436 is an abundant number, since it is smaller than the sum of its proper divisors (1502855956).

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

1340635436 is a wasteful number, since it uses less digits than its factorization.

1340635436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4490 (or 4488 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 35.

The square root of 1340635436 is about 36614.6888010809. The cubic root of 1340635436 is about 1102.6480104590.

Adding to 1340635436 its reverse (6345360431), we get a palindrome (7685995867).

The spelling of 1340635436 in words is "one billion, three hundred forty million, six hundred thirty-five thousand, four hundred thirty-six".