1340542044 has 18 divisors (see below), whose sum is σ = 3388592480. Its totient is φ = 446847336.

The previous prime is 1340542031. The next prime is 1340542057. The reversal of 1340542044 is 4402450431.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1340542031) and next prime (1340542057).

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 1340541999 and 1340542017.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18618604 + ... + 18618675.

Almost surely, 2^1340542044 is an apocalyptic number.

It is an amenable number.

1340542044 is an abundant number, since it is smaller than the sum of its proper divisors (2048050436).

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

1340542044 is a wasteful number, since it uses less digits than its factorization.

1340542044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37237289 (or 37237284 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

The square root of 1340542044 is about 36613.4134437094. The cubic root of 1340542044 is about 1102.6224054632.

Adding to 1340542044 its reverse (4402450431), we get a palindrome (5742992475).

The spelling of 1340542044 in words is "one billion, three hundred forty million, five hundred forty-two thousand, forty-four".