1318423938 has 16 divisors (see below), whose sum is σ = 2839682496. Its totient is φ = 405668880.

The previous prime is 1318423937. The next prime is 1318423949. The reversal of 1318423938 is 8393248131.

It is a self number, because there is not a number n which added to its sum of digits gives 1318423938.

It is not an unprimeable number, because it can be changed into a prime (1318423937) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8451358 + ... + 8451513.

It is an arithmetic number, because the mean of its divisors is an integer number (177480156).

Almost surely, 2^1318423938 is an apocalyptic number.

1318423938 is an abundant number, since it is smaller than the sum of its proper divisors (1521258558).

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

1318423938 is a wasteful number, since it uses less digits than its factorization.

1318423938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16902889.

The product of its digits is 124416, while the sum is 42.

The square root of 1318423938 is about 36310.1079315388. The cubic root of 1318423938 is about 1096.5245509967.

The spelling of 1318423938 in words is "one billion, three hundred eighteen million, four hundred twenty-three thousand, nine hundred thirty-eight".