42878384 has 10 divisors (see below), whose sum is σ = 83076900. Its totient is φ = 21439184.

The previous prime is 42878377. The next prime is 42878387. The reversal of 42878384 is 48387824.

It is not an unprimeable number, because it can be changed into a prime (42878387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1339934 + ... + 1339965.

It is an arithmetic number, because the mean of its divisors is an integer number (8307690).

Almost surely, 2^42878384 is an apocalyptic number.

It is an amenable number.

42878384 is a deficient number, since it is larger than the sum of its proper divisors (40198516).

42878384 is a wasteful number, since it uses less digits than its factorization.

42878384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2679907 (or 2679901 counting only the distinct ones).

The product of its digits is 344064, while the sum is 44.

The square root of 42878384 is about 6548.1588251966. The cubic root of 42878384 is about 350.0092079210.

The spelling of 42878384 in words is "forty-two million, eight hundred seventy-eight thousand, three hundred eighty-four".