42744164 has 24 divisors (see below), whose sum is σ = 78494976. Its totient is φ = 20340000.

The previous prime is 42744161. The next prime is 42744179. The reversal of 42744164 is 46144724.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 42744164.

It is not an unprimeable number, because it can be changed into a prime (42744161) 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 7 ways as a sum of consecutive naturals, for example, 4739 + ... + 10389.

It is an arithmetic number, because the mean of its divisors is an integer number (3270624).

Almost surely, 2^42744164 is an apocalyptic number.

It is an amenable number.

42744164 is a deficient number, since it is larger than the sum of its proper divisors (35750812).

42744164 is a wasteful number, since it uses less digits than its factorization.

42744164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5747 (or 5745 counting only the distinct ones).

The product of its digits is 21504, while the sum is 32.

The square root of 42744164 is about 6537.9021100044. The cubic root of 42744164 is about 349.6436209222.

Adding to 42744164 its reverse (46144724), we get a palindrome (88888888).

The spelling of 42744164 in words is "forty-two million, seven hundred forty-four thousand, one hundred sixty-four".