43987005 has 24 divisors (see below), whose sum is σ = 76426272. Its totient is φ = 23403744.

The previous prime is 43987003. The next prime is 43987051. The reversal of 43987005 is 50078934.

It is not a de Polignac number, because 43987005 - 2¹ = 43987003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43987003) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23722 + ... + 25508.

It is an arithmetic number, because the mean of its divisors is an integer number (3184428).

Almost surely, 2^43987005 is an apocalyptic number.

43987005 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

43987005 is a deficient number, since it is larger than the sum of its proper divisors (32439267).

43987005 is a wasteful number, since it uses less digits than its factorization.

43987005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2345 (or 2342 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 43987005 is about 6632.2699733952. The cubic root of 43987005 is about 353.0000749009. Note that the first 4 decimals are identical.

The spelling of 43987005 in words is "forty-three million, nine hundred eighty-seven thousand, five".