1340423403 has 8 divisors (see below), whose sum is σ = 1949706816. Its totient is φ = 812377800.

The previous prime is 1340423387. The next prime is 1340423411. The reversal of 1340423403 is 3043240431.

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

It is not a de Polignac number, because 1340423403 - 2⁴ = 1340423387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1340423473) 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, 20309413 + ... + 20309478.

It is an arithmetic number, because the mean of its divisors is an integer number (243713352).

Almost surely, 2^1340423403 is an apocalyptic number.

1340423403 is a deficient number, since it is larger than the sum of its proper divisors (609283413).

1340423403 is a wasteful number, since it uses less digits than its factorization.

1340423403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40618905.

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 1340423403 is about 36611.7932229494. The cubic root of 1340423403 is about 1102.5898763121.

Adding to 1340423403 its reverse (3043240431), we get a palindrome (4383663834).

The spelling of 1340423403 in words is "one billion, three hundred forty million, four hundred twenty-three thousand, four hundred three".