42138744 has 32 divisors (see below), whose sum is σ = 107136000. Its totient is φ = 13807712.

The previous prime is 42138689. The next prime is 42138781. The reversal of 42138744 is 44783124.

42138744 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 13464 + ... + 16295.

It is an arithmetic number, because the mean of its divisors is an integer number (3348000).

Almost surely, 2^42138744 is an apocalyptic number.

It is an amenable number.

42138744 is an abundant number, since it is smaller than the sum of its proper divisors (64997256).

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

42138744 is a wasteful number, since it uses less digits than its factorization.

42138744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29827 (or 29823 counting only the distinct ones).

The product of its digits is 21504, while the sum is 33.

The square root of 42138744 is about 6491.4362047239. The cubic root of 42138744 is about 347.9850039779.

The spelling of 42138744 in words is "forty-two million, one hundred thirty-eight thousand, seven hundred forty-four".