1340404224 has 40 divisors (see below), whose sum is σ = 3570924720. Its totient is φ = 446800896.

The previous prime is 1340404207. The next prime is 1340404237. The reversal of 1340404224 is 4224040431.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 1340404194 and 1340404203.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 434794 + ... + 437865.

It is an arithmetic number, because the mean of its divisors is an integer number (89273118).

Almost surely, 2^1340404224 is an apocalyptic number.

It is an amenable number.

1340404224 is an abundant number, since it is smaller than the sum of its proper divisors (2230520496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1340404224 is an frugal number, since it uses more digits than its factorization.

1340404224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 872680 (or 872664 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 1340404224 is about 36611.5312982126. The cubic root of 1340404224 is about 1102.5846176075.

Adding to 1340404224 its reverse (4224040431), we get a palindrome (5564444655).

The spelling of 1340404224 in words is "one billion, three hundred forty million, four hundred four thousand, two hundred twenty-four".