43243538 has 16 divisors (see below), whose sum is σ = 69964440. Its totient is φ = 19927296.

The previous prime is 43243537. The next prime is 43243583. The reversal of 43243538 is 83534234.

It can be written as a sum of positive squares in 4 ways, for example, as 11580409 + 31663129 = 3403^2 + 5627^2 .

It is not an unprimeable number, because it can be changed into a prime (43243537) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 28298 + ... + 29786.

Almost surely, 2^43243538 is an apocalyptic number.

43243538 is a deficient number, since it is larger than the sum of its proper divisors (26720902).

43243538 is a wasteful number, since it uses less digits than its factorization.

43243538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2621.

The product of its digits is 34560, while the sum is 32.

The square root of 43243538 is about 6575.9819038680. The cubic root of 43243538 is about 350.9999648271. Note that the first 4 decimals are identical.

The spelling of 43243538 in words is "forty-three million, two hundred forty-three thousand, five hundred thirty-eight".