1340431064 has 24 divisors (see below), whose sum is σ = 2923645140. Its totient is φ = 574470288.

The previous prime is 1340431063. The next prime is 1340431073. The reversal of 1340431064 is 4601340431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340431061) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1709342 + ... + 1710125.

Almost surely, 2^1340431064 is an apocalyptic number.

1340431064 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1340431064 is an abundant number, since it is smaller than the sum of its proper divisors (1583214076).

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

1340431064 is a wasteful number, since it uses less digits than its factorization.

1340431064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3419487 (or 3419476 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 1340431064 is about 36611.8978475577. The cubic root of 1340431064 is about 1102.5919768735.

Adding to 1340431064 its reverse (4601340431), we get a palindrome (5941771495).

The spelling of 1340431064 in words is "one billion, three hundred forty million, four hundred thirty-one thousand, sixty-four".