42838642 has 40 divisors (see below), whose sum is σ = 81878832. Its totient is φ = 16669800.

The previous prime is 42838633. The next prime is 42838643. The reversal of 42838642 is 24683824.

42838642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (42838643) 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 19 ways as a sum of consecutive naturals, for example, 52417 + ... + 53227.

Almost surely, 2^42838642 is an apocalyptic number.

42838642 is a deficient number, since it is larger than the sum of its proper divisors (39040190).

42838642 is an equidigital number, since it uses as much as digits as its factorization.

42838642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 852 (or 831 counting only the distinct ones).

The product of its digits is 73728, while the sum is 37.

The square root of 42838642 is about 6545.1235282460. The cubic root of 42838642 is about 349.9010386883.

The spelling of 42838642 in words is "forty-two million, eight hundred thirty-eight thousand, six hundred forty-two".