43849965 has 32 divisors (see below), whose sum is σ = 72963072. Its totient is φ = 22464000.

The previous prime is 43849963. The next prime is 43849969. The reversal of 43849965 is 56994834.

It is not a de Polignac number, because 43849965 - 2¹ = 43849963 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43849961) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 83905 + ... + 84425.

It is an arithmetic number, because the mean of its divisors is an integer number (2280096).

Almost surely, 2^43849965 is an apocalyptic number.

It is an amenable number.

43849965 is a deficient number, since it is larger than the sum of its proper divisors (29113107).

43849965 is a wasteful number, since it uses less digits than its factorization.

43849965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 741.

The product of its digits is 933120, while the sum is 48.

The square root of 43849965 is about 6621.9306097240. The cubic root of 43849965 is about 352.6331070172.

It can be divided in two parts, 438 and 49965, that added together give a triangular number (50403 = T₃₁₇).

The spelling of 43849965 in words is "forty-three million, eight hundred forty-nine thousand, nine hundred sixty-five".