1318803426 has 48 divisors (see below), whose sum is σ = 2976779520. Its totient is φ = 421498080.

The previous prime is 1318803419. The next prime is 1318803439. The reversal of 1318803426 is 6243088131.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49981 + ... + 71663.

It is an arithmetic number, because the mean of its divisors is an integer number (62016240).

Almost surely, 2^1318803426 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1318803426, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1488389760).

1318803426 is an abundant number, since it is smaller than the sum of its proper divisors (1657976094).

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

1318803426 is a wasteful number, since it uses less digits than its factorization.

1318803426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21831 (or 21828 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 1318803426 is about 36315.3332078889. Note that the first 3 decimals coincide. The cubic root of 1318803426 is about 1096.6297467988.

The spelling of 1318803426 in words is "one billion, three hundred eighteen million, eight hundred three thousand, four hundred twenty-six".