43128194 has 4 divisors (see below), whose sum is σ = 64692294. Its totient is φ = 21564096.

The previous prime is 43128193. The next prime is 43128203. The reversal of 43128194 is 49182134.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 43072969 + 55225 = 6563^2 + 235^2 .

It is a super-2 number, since 2×43128194² = 3720082235403272, 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 43128194.

It is not an unprimeable number, because it can be changed into a prime (43128193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10782047 + ... + 10782050.

Almost surely, 2^43128194 is an apocalyptic number.

43128194 is a deficient number, since it is larger than the sum of its proper divisors (21564100).

43128194 is a wasteful number, since it uses less digits than its factorization.

43128194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21564099.

The product of its digits is 6912, while the sum is 32.

The square root of 43128194 is about 6567.2059507830. The cubic root of 43128194 is about 350.6876114962.

The spelling of 43128194 in words is "forty-three million, one hundred twenty-eight thousand, one hundred ninety-four".