1340520444 has 18 divisors (see below), whose sum is σ = 3388537880. Its totient is φ = 446840136.

The previous prime is 1340520437. The next prime is 1340520449. The reversal of 1340520444 is 4440250431.

It is a happy number.

1340520444 is a `hidden beast` number, since 13 + 405 + 204 + 44 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340520449) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18618304 + ... + 18618375.

Almost surely, 2^1340520444 is an apocalyptic number.

It is an amenable number.

1340520444 is an abundant number, since it is smaller than the sum of its proper divisors (2048017436).

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

1340520444 is a wasteful number, since it uses less digits than its factorization.

1340520444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37236689 (or 37236684 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

The square root of 1340520444 is about 36613.1184686582. The cubic root of 1340520444 is about 1102.6164832886.

Adding to 1340520444 its reverse (4440250431), we get a palindrome (5780770875).

It can be divided in two parts, 1340520 and 444, that added together give a square (1340964 = 1158²).

The spelling of 1340520444 in words is "one billion, three hundred forty million, five hundred twenty thousand, four hundred forty-four".