43871646 has 64 divisors (see below), whose sum is σ = 113702400. Its totient is φ = 10958976.

The previous prime is 43871621. The next prime is 43871657. The reversal of 43871646 is 64617834.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8260 + ... + 12488.

It is an arithmetic number, because the mean of its divisors is an integer number (1776600).

Almost surely, 2^43871646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43871646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56851200).

43871646 is an abundant number, since it is smaller than the sum of its proper divisors (69830754).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

43871646 is a wasteful number, since it uses less digits than its factorization.

43871646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4273.

The product of its digits is 96768, while the sum is 39.

The square root of 43871646 is about 6623.5674677624. The cubic root of 43871646 is about 352.6912156054.

The spelling of 43871646 in words is "forty-three million, eight hundred seventy-one thousand, six hundred forty-six".