1340660432 has 20 divisors (see below), whose sum is σ = 2710466400. Its totient is φ = 641185248.

The previous prime is 1340660423. The next prime is 1340660449. The reversal of 1340660432 is 2340660431.

It is a junction number, because it is equal to n+sod(n) for n = 1340660395 and 1340660404.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 1821182 + ... + 1821917.

It is an arithmetic number, because the mean of its divisors is an integer number (135523320).

Almost surely, 2^1340660432 is an apocalyptic number.

It is an amenable number.

1340660432 is an abundant number, since it is smaller than the sum of its proper divisors (1369805968).

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

1340660432 is a wasteful number, since it uses less digits than its factorization.

1340660432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3643130 (or 3643124 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 1340660432 is about 36615.0301379092. The cubic root of 1340660432 is about 1102.6548633333.

Subtracting 1340660432 from its reverse (2340660431), we obtain a palindrome (999999999).

The spelling of 1340660432 in words is "one billion, three hundred forty million, six hundred sixty thousand, four hundred thirty-two".