43840361 has 4 divisors (see below), whose sum is σ = 44250192. Its totient is φ = 43430532.

The previous prime is 43840343. The next prime is 43840393. The reversal of 43840361 is 16304834.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43840361 is a prime.

It is a super-2 number, since 2×43840361² = 3843954505220642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43840061) 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, 204755 + ... + 204968.

It is an arithmetic number, because the mean of its divisors is an integer number (11062548).

Almost surely, 2^43840361 is an apocalyptic number.

It is an amenable number.

43840361 is a deficient number, since it is larger than the sum of its proper divisors (409831).

43840361 is a wasteful number, since it uses less digits than its factorization.

43840361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409830.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 43840361 is about 6621.2054038521. The cubic root of 43840361 is about 352.6073606216.

The spelling of 43840361 in words is "forty-three million, eight hundred forty thousand, three hundred sixty-one".