1316278420 has 12 divisors (see below), whose sum is σ = 2764184724. Its totient is φ = 526511360.

The previous prime is 1316278357. The next prime is 1316278421. The reversal of 1316278420 is 248726131.

It can be written as a sum of positive squares in 2 ways, for example, as 1031951376 + 284327044 = 32124^2 + 16862^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1316278421) 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, 32906941 + ... + 32906980.

It is an arithmetic number, because the mean of its divisors is an integer number (230348727).

Almost surely, 2^1316278420 is an apocalyptic number.

1316278420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1316278420 is an abundant number, since it is smaller than the sum of its proper divisors (1447906304).

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

1316278420 is a wasteful number, since it uses less digits than its factorization.

1316278420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65813930 (or 65813928 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 1316278420 is about 36280.5515393578. The cubic root of 1316278420 is about 1095.9294236348.

The spelling of 1316278420 in words is "one billion, three hundred sixteen million, two hundred seventy-eight thousand, four hundred twenty".