43881987 has 8 divisors (see below), whose sum is σ = 58956480. Its totient is φ = 29031080.

The previous prime is 43881961. The next prime is 43881991. The reversal of 43881987 is 78918834.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 43881987 - 2¹¹ = 43879939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (43881917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55437 + ... + 56222.

It is an arithmetic number, because the mean of its divisors is an integer number (7369560).

Almost surely, 2^43881987 is an apocalyptic number.

43881987 is a deficient number, since it is larger than the sum of its proper divisors (15074493).

43881987 is a wasteful number, since it uses less digits than its factorization.

43881987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111793.

The product of its digits is 387072, while the sum is 48.

The square root of 43881987 is about 6624.3480433926. The cubic root of 43881987 is about 352.7189244156.

The spelling of 43881987 in words is "forty-three million, eight hundred eighty-one thousand, nine hundred eighty-seven".