1340039403 has 8 divisors (see below), whose sum is σ = 1985243600. Its totient is φ = 893359584.

The previous prime is 1340039341. The next prime is 1340039411. The reversal of 1340039403 is 3049300431.

It is not a de Polignac number, because 1340039403 - 2¹³ = 1340031211 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 49631089 = 1340039403 / (1 + 3 + 4 + 0 + 0 + 3 + 9 + 4 + 0 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1340039413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24815518 + ... + 24815571.

It is an arithmetic number, because the mean of its divisors is an integer number (248155450).

Almost surely, 2^1340039403 is an apocalyptic number.

1340039403 is a deficient number, since it is larger than the sum of its proper divisors (645204197).

1340039403 is an equidigital number, since it uses as much as digits as its factorization.

1340039403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49631098 (or 49631092 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 1340039403 is about 36606.5486354559. The cubic root of 1340039403 is about 1102.4845775065.

Adding to 1340039403 its reverse (3049300431), we get a palindrome (4389339834).

The spelling of 1340039403 in words is "one billion, three hundred forty million, thirty-nine thousand, four hundred three".