1340040403 has 8 divisors (see below), whose sum is σ = 1457132768. Its totient is φ = 1224949824.

The previous prime is 1340040389. The next prime is 1340040409. The reversal of 1340040403 is 3040400431.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1340040403 - 2¹⁷ = 1339909331 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1340040409) 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, 499050 + ... + 501727.

It is an arithmetic number, because the mean of its divisors is an integer number (182141596).

Almost surely, 2^1340040403 is an apocalyptic number.

1340040403 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1340040403 is a deficient number, since it is larger than the sum of its proper divisors (117092365).

1340040403 is a wasteful number, since it uses less digits than its factorization.

1340040403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000893.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 1340040403 is about 36606.5622942117. The cubic root of 1340040403 is about 1102.4848517483.

Adding to 1340040403 its reverse (3040400431), we get a palindrome (4380440834).

The spelling of 1340040403 in words is "one billion, three hundred forty million, forty thousand, four hundred three".