42783218 has 8 divisors (see below), whose sum is σ = 64233948. Its totient is φ = 21371904.

The previous prime is 42783217. The next prime is 42783241. The reversal of 42783218 is 81238724.

42783218 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 42289009 + 494209 = 6503^2 + 703^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (42783217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6971 + ... + 11582.

Almost surely, 2^42783218 is an apocalyptic number.

42783218 is a deficient number, since it is larger than the sum of its proper divisors (21450730).

42783218 is a wasteful number, since it uses less digits than its factorization.

42783218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19708.

The product of its digits is 21504, while the sum is 35.

The square root of 42783218 is about 6540.8881659909. Note that the first 3 decimals coincide. The cubic root of 42783218 is about 349.7500746389.

The spelling of 42783218 in words is "forty-two million, seven hundred eighty-three thousand, two hundred eighteen".