1340042404 has 6 divisors (see below), whose sum is σ = 2345074214. Its totient is φ = 670021200.

The previous prime is 1340042383. The next prime is 1340042423. The reversal of 1340042404 is 4042400431.

It can be written as a sum of positive squares in only one way, i.e., 727380900 + 612661504 = 26970^2 + 24752^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 167505297 + ... + 167505304.

Almost surely, 2^1340042404 is an apocalyptic number.

It is an amenable number.

1340042404 is a deficient number, since it is larger than the sum of its proper divisors (1005031810).

1340042404 is a wasteful number, since it uses less digits than its factorization.

1340042404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335010605 (or 335010603 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 1340042404 is about 36606.5896253666. The cubic root of 1340042404 is about 1102.4854005056.

Adding to 1340042404 its reverse (4042400431), we get a palindrome (5382442835).

The spelling of 1340042404 in words is "one billion, three hundred forty million, forty-two thousand, four hundred four".