1340230720 has 28 divisors (see below), whose sum is σ = 3191425164. Its totient is φ = 536092160.

The previous prime is 1340230637. The next prime is 1340230763. The reversal of 1340230720 is 270320431.

It can be written as a sum of positive squares in 2 ways, for example, as 380718144 + 959512576 = 19512^2 + 30976^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1340230691 and 1340230700.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2093791 + ... + 2094430.

Almost surely, 2^1340230720 is an apocalyptic number.

1340230720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1340230720 is an abundant number, since it is smaller than the sum of its proper divisors (1851194444).

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

1340230720 is an equidigital number, since it uses as much as digits as its factorization.

1340230720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4188238 (or 4188228 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 1340230720 is about 36609.1616948545. The cubic root of 1340230720 is about 1102.5370421341.

The spelling of 1340230720 in words is "one billion, three hundred forty million, two hundred thirty thousand, seven hundred twenty".