1340402031 has 12 divisors (see below), whose sum is σ = 1936504752. Its totient is φ = 893431296.

The previous prime is 1340401973. The next prime is 1340402039. The reversal of 1340402031 is 1302040431.

It is not a de Polignac number, because 1340402031 - 2¹⁷ = 1340270959 is a prime.

It is a super-2 number, since 2×1340402031² = 3593355209417849922, which contains 22 as substring.

1340402031 is a Rhonda number in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 1340401995 and 1340402013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340402039) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52015 + ... + 73391.

It is an arithmetic number, because the mean of its divisors is an integer number (161375396).

Almost surely, 2^1340402031 is an apocalyptic number.

1340402031 is a deficient number, since it is larger than the sum of its proper divisors (596102721).

1340402031 is a wasteful number, since it uses less digits than its factorization.

1340402031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28350 (or 28347 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1340402031 is about 36611.5013486199. The cubic root of 1340402031 is about 1102.5840163039.

Adding to 1340402031 its reverse (1302040431), we get a palindrome (2642442462).

The spelling of 1340402031 in words is "one billion, three hundred forty million, four hundred two thousand, thirty-one".