43428337 has 4 divisors (see below), whose sum is σ = 43585396. Its totient is φ = 43271280.

The previous prime is 43428317. The next prime is 43428373. The reversal of 43428337 is 73382434.

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 2 ways, for example, as 15295921 + 28132416 = 3911^2 + 5304^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43428337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (43428317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78114 + ... + 78667.

It is an arithmetic number, because the mean of its divisors is an integer number (10896349).

Almost surely, 2^43428337 is an apocalyptic number.

It is an amenable number.

43428337 is a deficient number, since it is larger than the sum of its proper divisors (157059).

43428337 is a wasteful number, since it uses less digits than its factorization.

43428337 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157058.

The product of its digits is 48384, while the sum is 34.

The square root of 43428337 is about 6590.0179817661. The cubic root of 43428337 is about 351.4992476176.

The spelling of 43428337 in words is "forty-three million, four hundred twenty-eight thousand, three hundred thirty-seven".