43809648 has 80 divisors (see below), whose sum is σ = 117554976. Its totient is φ = 14049280.

The previous prime is 43809643. The next prime is 43809677. The reversal of 43809648 is 84690834.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43809643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 222286 + ... + 222482.

Almost surely, 2^43809648 is an apocalyptic number.

43809648 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 43809648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58777488).

43809648 is an abundant number, since it is smaller than the sum of its proper divisors (73745328).

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

43809648 is a wasteful number, since it uses less digits than its factorization.

43809648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362 (or 356 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 42.

The square root of 43809648 is about 6618.8857068241. The cubic root of 43809648 is about 352.5249999874.

It can be divided in two parts, 4380 and 9648, that added together give a triangular number (14028 = T₁₆₇).

The spelling of 43809648 in words is "forty-three million, eight hundred nine thousand, six hundred forty-eight".