43139938 has 8 divisors (see below), whose sum is σ = 64778688. Its totient is φ = 21547044.

The previous prime is 43139923. The next prime is 43139951. The reversal of 43139938 is 83993134.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×43139938² = 3722108501287688, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 43139938.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9006 + ... + 12937.

It is an arithmetic number, because the mean of its divisors is an integer number (8097336).

Almost surely, 2^43139938 is an apocalyptic number.

43139938 is a deficient number, since it is larger than the sum of its proper divisors (21638750).

43139938 is a wasteful number, since it uses less digits than its factorization.

43139938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22928.

The product of its digits is 69984, while the sum is 40.

The square root of 43139938 is about 6568.1000296890. The cubic root of 43139938 is about 350.7194398754.

The spelling of 43139938 in words is "forty-three million, one hundred thirty-nine thousand, nine hundred thirty-eight".