1340849938 has 4 divisors (see below), whose sum is σ = 2011274910. Its totient is φ = 670424968.

The previous prime is 1340849927. The next prime is 1340849941. The reversal of 1340849938 is 8399480431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8399480431 = 5387 ⋅1559213.

It can be written as a sum of positive squares in only one way, i.e., 1300107249 + 40742689 = 36057^2 + 6383^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 1340849891 and 1340849900.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335212483 + ... + 335212486.

Almost surely, 2^1340849938 is an apocalyptic number.

1340849938 is a deficient number, since it is larger than the sum of its proper divisors (670424972).

1340849938 is an equidigital number, since it uses as much as digits as its factorization.

1340849938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670424971.

The product of its (nonzero) digits is 746496, while the sum is 49.

The square root of 1340849938 is about 36617.6178635367. The cubic root of 1340849938 is about 1102.7068153073.

The spelling of 1340849938 in words is "one billion, three hundred forty million, eight hundred forty-nine thousand, nine hundred thirty-eight".