43138572 has 12 divisors (see below), whose sum is σ = 100656696. Its totient is φ = 14379520.

The previous prime is 43138549. The next prime is 43138619. The reversal of 43138572 is 27583134.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1797429 + ... + 1797452.

It is an arithmetic number, because the mean of its divisors is an integer number (8388058).

Almost surely, 2^43138572 is an apocalyptic number.

It is an amenable number.

43138572 is an abundant number, since it is smaller than the sum of its proper divisors (57518124).

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

43138572 is a wasteful number, since it uses less digits than its factorization.

43138572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3594888 (or 3594886 counting only the distinct ones).

The product of its digits is 20160, while the sum is 33.

The square root of 43138572 is about 6567.9960414117. The cubic root of 43138572 is about 350.7157380634.

The spelling of 43138572 in words is "forty-three million, one hundred thirty-eight thousand, five hundred seventy-two".