1340040342 has 16 divisors (see below), whose sum is σ = 2699363520. Its totient is φ = 443466312.

The previous prime is 1340040311. The next prime is 1340040343. The reversal of 1340040342 is 2430400431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340040343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 802548 + ... + 804215.

It is an arithmetic number, because the mean of its divisors is an integer number (168710220).

Almost surely, 2^1340040342 is an apocalyptic number.

1340040342 is an abundant number, since it is smaller than the sum of its proper divisors (1359323178).

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

1340040342 is a wasteful number, since it uses less digits than its factorization.

1340040342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1606907.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 1340040342 is about 36606.5614610277. The cubic root of 1340040342 is about 1102.4848350195.

Adding to 1340040342 its reverse (2430400431), we get a palindrome (3770440773).

The spelling of 1340040342 in words is "one billion, three hundred forty million, forty thousand, three hundred forty-two".