1340404456 has 32 divisors (see below), whose sum is σ = 2565060480. Its totient is φ = 656510400.

The previous prime is 1340404453. The next prime is 1340404469. The reversal of 1340404456 is 6544040431.

It is not an unprimeable number, because it can be changed into a prime (1340404451) 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, 81661 + ... + 96691.

It is an arithmetic number, because the mean of its divisors is an integer number (80158140).

Almost surely, 2^1340404456 is an apocalyptic number.

It is an amenable number.

1340404456 is a deficient number, since it is larger than the sum of its proper divisors (1224656024).

1340404456 is a wasteful number, since it uses less digits than its factorization.

1340404456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15265 (or 15261 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 31.

The square root of 1340404456 is about 36611.5344666131. The cubic root of 1340404456 is about 1102.5846812200.

Adding to 1340404456 its reverse (6544040431), we get a palindrome (7884444887).

The spelling of 1340404456 in words is "one billion, three hundred forty million, four hundred four thousand, four hundred fifty-six".