4139538 has 32 divisors (see below), whose sum is σ = 9050496. Its totient is φ = 1254528.

The previous prime is 4139537. The next prime is 4139539. The reversal of 4139538 is 8359314.

4139538 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (4139537) and next prime (4139539).

It is a junction number, because it is equal to n+sod(n) for n = 4139499 and 4139508.

It is not an unprimeable number, because it can be changed into a prime (4139533) 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 in 15 ways as a sum of consecutive naturals, for example, 5331 + ... + 6057.

It is an arithmetic number, because the mean of its divisors is an integer number (282828).

Almost surely, 2^4139538 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4139538, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4525248).

4139538 is an abundant number, since it is smaller than the sum of its proper divisors (4910958).

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

4139538 is a wasteful number, since it uses less digits than its factorization.

4139538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818.

The product of its digits is 12960, while the sum is 33.

The square root of 4139538 is about 2034.5854614638. The cubic root of 4139538 is about 160.5649042146.

The spelling of 4139538 in words is "four million, one hundred thirty-nine thousand, five hundred thirty-eight".