42388938 has 12 divisors (see below), whose sum is σ = 91842738. Its totient is φ = 14129640.

The previous prime is 42388921. The next prime is 42388949. The reversal of 42388938 is 83988324.

42388938 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 only one way, i.e., 40793769 + 1595169 = 6387^2 + 1263^2 .

It is a junction number, because it is equal to n+sod(n) for n = 42388893 and 42388902.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 1177453 + ... + 1177488.

Almost surely, 2^42388938 is an apocalyptic number.

42388938 is an abundant number, since it is smaller than the sum of its proper divisors (49453800).

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

42388938 is a wasteful number, since it uses less digits than its factorization.

42388938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2354949 (or 2354946 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 42388938 is about 6510.6787664575. The cubic root of 42388938 is about 348.6723525443.

The spelling of 42388938 in words is "forty-two million, three hundred eighty-eight thousand, nine hundred thirty-eight".