42388837 has 8 divisors (see below), whose sum is σ = 45498456. Its totient is φ = 39347712.

The previous prime is 42388813. The next prime is 42388859. The reversal of 42388837 is 73888324.

42388837 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 4 ways, for example, as 18241441 + 24147396 = 4271^2 + 4914^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 42388837 - 2¹¹ = 42386789 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42388793 and 42388802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42388897) 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 7 ways as a sum of consecutive naturals, for example, 15838 + ... + 18319.

It is an arithmetic number, because the mean of its divisors is an integer number (5687307).

Almost surely, 2^42388837 is an apocalyptic number.

It is an amenable number.

42388837 is a deficient number, since it is larger than the sum of its proper divisors (3109619).

42388837 is a wasteful number, since it uses less digits than its factorization.

42388837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34247.

The product of its digits is 258048, while the sum is 43.

The square root of 42388837 is about 6510.6710099651. The cubic root of 42388837 is about 348.6720756172.

The spelling of 42388837 in words is "forty-two million, three hundred eighty-eight thousand, eight hundred thirty-seven".