1311440452 has 24 divisors (see below), whose sum is σ = 2777169024. Its totient is φ = 528984192.

The previous prime is 1311440443. The next prime is 1311440467. The reversal of 1311440452 is 2540441131.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1377088 + ... + 1378039.

It is an arithmetic number, because the mean of its divisors is an integer number (115715376).

Almost surely, 2^1311440452 is an apocalyptic number.

It is an amenable number.

1311440452 is an abundant number, since it is smaller than the sum of its proper divisors (1465728572).

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

1311440452 is a wasteful number, since it uses less digits than its factorization.

1311440452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2755155 (or 2755153 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 1311440452 is about 36213.8157613914. The cubic root of 1311440452 is about 1094.5850827514.

Adding to 1311440452 its reverse (2540441131), we get a palindrome (3851881583).

The spelling of 1311440452 in words is "one billion, three hundred eleven million, four hundred forty thousand, four hundred fifty-two".