43138988 has 6 divisors (see below), whose sum is σ = 75493236. Its totient is φ = 21569492.

The previous prime is 43138981. The next prime is 43139023. The reversal of 43138988 is 88983134.

It is not an unprimeable number, because it can be changed into a prime (43138981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5392370 + ... + 5392377.

It is an arithmetic number, because the mean of its divisors is an integer number (12582206).

Almost surely, 2^43138988 is an apocalyptic number.

It is an amenable number.

43138988 is a deficient number, since it is larger than the sum of its proper divisors (32354248).

43138988 is a wasteful number, since it uses less digits than its factorization.

43138988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10784751 (or 10784749 counting only the distinct ones).

The product of its digits is 165888, while the sum is 44.

The square root of 43138988 is about 6568.0277100512. The cubic root of 43138988 is about 350.7168654171.

The spelling of 43138988 in words is "forty-three million, one hundred thirty-eight thousand, nine hundred eighty-eight".