4181538 has 32 divisors (see below), whose sum is σ = 8827776. Its totient is φ = 1317888.

The previous prime is 4181533. The next prime is 4181557. The reversal of 4181538 is 8351814.

It is not an unprimeable number, because it can be changed into a prime (4181531) 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 15 ways as a sum of consecutive naturals, for example, 21570 + ... + 21762.

It is an arithmetic number, because the mean of its divisors is an integer number (275868).

Almost surely, 2^4181538 is an apocalyptic number.

4181538 is an abundant number, since it is smaller than the sum of its proper divisors (4646238).

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

4181538 is a wasteful number, since it uses less digits than its factorization.

4181538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378.

The product of its digits is 3840, while the sum is 30.

The square root of 4181538 is about 2044.8809256287. The cubic root of 4181538 is about 161.1061116518.

The spelling of 4181538 in words is "four million, one hundred eighty-one thousand, five hundred thirty-eight".