43881489 has 6 divisors (see below), whose sum is σ = 63384386. Its totient is φ = 29254320.

The previous prime is 43881473. The next prime is 43881491. The reversal of 43881489 is 98418834.

It can be written as a sum of positive squares in only one way, i.e., 43560000 + 321489 = 6600^2 + 567^2 .

It is not a de Polignac number, because 43881489 - 2⁴ = 43881473 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (43881499) 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 5 ways as a sum of consecutive naturals, for example, 2437852 + ... + 2437869.

Almost surely, 2^43881489 is an apocalyptic number.

It is an amenable number.

43881489 is a deficient number, since it is larger than the sum of its proper divisors (19502897).

43881489 is a wasteful number, since it uses less digits than its factorization.

43881489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4875727 (or 4875724 counting only the distinct ones).

The product of its digits is 221184, while the sum is 45.

The square root of 43881489 is about 6624.3104546813. The cubic root of 43881489 is about 352.7175901195.

The spelling of 43881489 in words is "forty-three million, eight hundred eighty-one thousand, four hundred eighty-nine".