1318581950 has 192 divisors, whose sum is σ = 3175511040. Its totient is φ = 396887040.

The previous prime is 1318581919. The next prime is 1318581959. The reversal of 1318581950 is 591858131.

It is a junction number, because it is equal to n+sod(n) for n = 1318581898 and 1318581907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1318581959) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5659034 + ... + 5659266.

It is an arithmetic number, because the mean of its divisors is an integer number (16539120).

Almost surely, 2^1318581950 is an apocalyptic number.

1318581950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1318581950 is an abundant number, since it is smaller than the sum of its proper divisors (1856929090).

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

1318581950 is a wasteful number, since it uses less digits than its factorization.

1318581950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331 (or 326 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 41.

The square root of 1318581950 is about 36312.2837342958. The cubic root of 1318581950 is about 1096.5683550952.

The spelling of 1318581950 in words is "one billion, three hundred eighteen million, five hundred eighty-one thousand, nine hundred fifty".