1340660431 has 8 divisors (see below), whose sum is σ = 1462933584. Its totient is φ = 1218453120.

The previous prime is 1340660423. The next prime is 1340660449.

1340660431 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1340660431 - 2³ = 1340660423 is a prime.

It is a super-2 number, since 2×1340660431² = 3594740782498211522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1340660431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340660471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32455 + ... + 61111.

It is an arithmetic number, because the mean of its divisors is an integer number (182866698).

Almost surely, 2^1340660431 is an apocalyptic number.

1340660431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1340660431 is a deficient number, since it is larger than the sum of its proper divisors (122273153).

1340660431 is a wasteful number, since it uses less digits than its factorization.

1340660431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32921.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 1340660431 is about 36615.0301242536. The cubic root of 1340660431 is about 1102.6548630592.

It can be divided in two parts, 13406 and 60431, that added together give a palindrome (73837).

The spelling of 1340660431 in words is "one billion, three hundred forty million, six hundred sixty thousand, four hundred thirty-one".