1340044220 has 24 divisors (see below), whose sum is σ = 2856097104. Its totient is φ = 528016896.

The previous prime is 1340044201. The next prime is 1340044229. The reversal of 1340044220 is 224400431.

It is a Harshad number since it is a multiple of its sum of digits (20).

1340044220 is a modest number, since divided by 44220 gives 1340 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 1340044192 and 1340044201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340044229) 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, 498677 + ... + 501356.

It is an arithmetic number, because the mean of its divisors is an integer number (119004046).

Almost surely, 2^1340044220 is an apocalyptic number.

1340044220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1340044220 is an abundant number, since it is smaller than the sum of its proper divisors (1516052884).

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

1340044220 is a wasteful number, since it uses less digits than its factorization.

1340044220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000109 (or 1000107 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 1340044220 is about 36606.6144296355. The cubic root of 1340044220 is about 1102.4858985278.

Adding to 1340044220 its reverse (224400431), we get a palindrome (1564444651).

The spelling of 1340044220 in words is "one billion, three hundred forty million, forty-four thousand, two hundred twenty".