42319818 has 12 divisors (see below), whose sum is σ = 91692978. Its totient is φ = 14106600.

The previous prime is 42319799. The next prime is 42319819. The reversal of 42319818 is 81891324.

It can be written as a sum of positive squares in only one way, i.e., 23941449 + 18378369 = 4893^2 + 4287^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42319819) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1175533 + ... + 1175568.

Almost surely, 2^42319818 is an apocalyptic number.

42319818 is an abundant number, since it is smaller than the sum of its proper divisors (49373160).

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

42319818 is a wasteful number, since it uses less digits than its factorization.

42319818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2351109 (or 2351106 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The square root of 42319818 is about 6505.3683984844. The cubic root of 42319818 is about 348.4827327565.

The spelling of 42319818 in words is "forty-two million, three hundred nineteen thousand, eight hundred eighteen".