1340635136 has 96 divisors (see below), whose sum is σ = 2854051200. Its totient is φ = 627793920.

The previous prime is 1340635081. The next prime is 1340635139. The reversal of 1340635136 is 6315360431.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340635139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5097341 + ... + 5097603.

It is an arithmetic number, because the mean of its divisors is an integer number (29729700).

Almost surely, 2^1340635136 is an apocalyptic number.

1340635136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1340635136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1427025600).

1340635136 is an abundant number, since it is smaller than the sum of its proper divisors (1513416064).

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

1340635136 is a wasteful number, since it uses less digits than its factorization.

1340635136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435 (or 415 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 1340635136 is about 36614.6847043642. The cubic root of 1340635136 is about 1102.6479282109.

Adding to 1340635136 its reverse (6315360431), we get a palindrome (7655995567).

The spelling of 1340635136 in words is "one billion, three hundred forty million, six hundred thirty-five thousand, one hundred thirty-six".