43887145 has 8 divisors (see below), whose sum is σ = 52792200. Its totient is φ = 35024640.

The previous prime is 43887113. The next prime is 43887161. The reversal of 43887145 is 54178834.

43887145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2039184 + 41847961 = 1428^2 + 6469^2 .

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

It is not a de Polignac number, because 43887145 - 2⁵ = 43887113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43887098 and 43887107.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8320 + ... + 12529.

It is an arithmetic number, because the mean of its divisors is an integer number (6599025).

Almost surely, 2^43887145 is an apocalyptic number.

It is an amenable number.

43887145 is a deficient number, since it is larger than the sum of its proper divisors (8905055).

43887145 is a wasteful number, since it uses less digits than its factorization.

43887145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21275.

The product of its digits is 107520, while the sum is 40.

The square root of 43887145 is about 6624.7373532843. The cubic root of 43887145 is about 352.7327436997.

The spelling of 43887145 in words is "forty-three million, eight hundred eighty-seven thousand, one hundred forty-five".