1440330413 has 4 divisors (see below), whose sum is σ = 1479258300. Its totient is φ = 1401402528.

The previous prime is 1440330407. The next prime is 1440330439. The reversal of 1440330413 is 3140330441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3140330441 = 277 ⋅11336933.

It can be written as a sum of positive squares in 2 ways, for example, as 801909124 + 638421289 = 28318^2 + 25267^2 .

It is not a de Polignac number, because 1440330413 - 2⁶ = 1440330349 is a prime.

It is a super-2 number, since 2×1440330413² = 4149103397225501138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440330113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19463888 + ... + 19463961.

It is an arithmetic number, because the mean of its divisors is an integer number (369814575).

Almost surely, 2^1440330413 is an apocalyptic number.

It is an amenable number.

1440330413 is a deficient number, since it is larger than the sum of its proper divisors (38927887).

1440330413 is an equidigital number, since it uses as much as digits as its factorization.

1440330413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38927886.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 1440330413 is about 37951.6852458491. The cubic root of 1440330413 is about 1129.3295976459.

Adding to 1440330413 its reverse (3140330441), we get a palindrome (4580660854).

The spelling of 1440330413 in words is "one billion, four hundred forty million, three hundred thirty thousand, four hundred thirteen".