43641648 has 60 divisors (see below), whose sum is σ = 125452288. Its totient is φ = 14152320.

The previous prime is 43641643. The next prime is 43641667. The reversal of 43641648 is 84614634.

43641648 is a `hidden beast` number, since 4 + 3 + 6 + 4 + 1 + 648 = 666.

43641648 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (43641643) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1233 + ... + 9423.

Almost surely, 2^43641648 is an apocalyptic number.

43641648 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43641648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62726144).

43641648 is an abundant number, since it is smaller than the sum of its proper divisors (81810640).

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

43641648 is a wasteful number, since it uses less digits than its factorization.

43641648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8242 (or 8233 counting only the distinct ones).

The product of its digits is 55296, while the sum is 36.

The square root of 43641648 is about 6606.1825587854. The cubic root of 43641648 is about 352.0738051162.

The spelling of 43641648 in words is "forty-three million, six hundred forty-one thousand, six hundred forty-eight".