318838042 has 4 divisors (see below), whose sum is σ = 478257066. Its totient is φ = 159419020.

The previous prime is 318838027. The next prime is 318838049. The reversal of 318838042 is 240838813.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 181737361 + 137100681 = 13481^2 + 11709^2 .

It is a junction number, because it is equal to n+sod(n) for n = 318837992 and 318838010.

It is not an unprimeable number, because it can be changed into a prime (318838049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79709509 + ... + 79709512.

Almost surely, 2^318838042 is an apocalyptic number.

318838042 is a deficient number, since it is larger than the sum of its proper divisors (159419024).

318838042 is a wasteful number, since it uses less digits than its factorization.

318838042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159419023.

The product of its (nonzero) digits is 36864, while the sum is 37.

The square root of 318838042 is about 17856.0365703031. The cubic root of 318838042 is about 683.1614911671.

The spelling of 318838042 in words is "three hundred eighteen million, eight hundred thirty-eight thousand, forty-two".