1340503720 has 32 divisors (see below), whose sum is σ = 3193554600. Its totient is φ = 504659968.

The previous prime is 1340503699. The next prime is 1340503721. The reversal of 1340503720 is 273050431.

It can be written as a sum of positive squares in 4 ways, for example, as 1185700356 + 154803364 = 34434^2 + 12442^2 .

It is not an unprimeable number, because it can be changed into a prime (1340503721) 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, 984985 + ... + 986344.

Almost surely, 2^1340503720 is an apocalyptic number.

1340503720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1340503720 is an abundant number, since it is smaller than the sum of its proper divisors (1853050880).

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

1340503720 is a wasteful number, since it uses less digits than its factorization.

1340503720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1971357 (or 1971353 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 1340503720 is about 36612.8900798612. The cubic root of 1340503720 is about 1102.6118979465.

The spelling of 1340503720 in words is "one billion, three hundred forty million, five hundred three thousand, seven hundred twenty".