1340788520 has 32 divisors (see below), whose sum is σ = 3018184200. Its totient is φ = 536064768.

The previous prime is 1340788513. The next prime is 1340788529. The reversal of 1340788520 is 258870431.

It can be written as a sum of positive squares in 4 ways, for example, as 964350916 + 376437604 = 31054^2 + 19402^2 .

It is not an unprimeable number, because it can be changed into a prime (1340788529) 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, 95726 + ... + 108834.

Almost surely, 2^1340788520 is an apocalyptic number.

1340788520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1340788520 is an abundant number, since it is smaller than the sum of its proper divisors (1677395680).

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

1340788520 is a wasteful number, since it uses less digits than its factorization.

1340788520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15677 (or 15673 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 38.

The square root of 1340788520 is about 36616.7792139068. The cubic root of 1340788520 is about 1102.6899784540.

The spelling of 1340788520 in words is "one billion, three hundred forty million, seven hundred eighty-eight thousand, five hundred twenty".