1340423031 has 16 divisors (see below), whose sum is σ = 1805443200. Its totient is φ = 884526048.

The previous prime is 1340423027. The next prime is 1340423057. The reversal of 1340423031 is 1303240431.

It is not a de Polignac number, because 1340423031 - 2² = 1340423027 is a prime.

It is a super-2 number, since 2×1340423031² = 3593467804070453922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1340422989 and 1340423007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340423131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 543880 + ... + 546338.

It is an arithmetic number, because the mean of its divisors is an integer number (112840200).

Almost surely, 2^1340423031 is an apocalyptic number.

1340423031 is a deficient number, since it is larger than the sum of its proper divisors (465020169).

1340423031 is a wasteful number, since it uses less digits than its factorization.

1340423031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4238.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 1340423031 is about 36611.7881426188. The cubic root of 1340423031 is about 1102.5897743136.

Adding to 1340423031 its reverse (1303240431), we get a palindrome (2643663462).

The spelling of 1340423031 in words is "one billion, three hundred forty million, four hundred twenty-three thousand, thirty-one".