43661696 has 64 divisors (see below), whose sum is σ = 98674800. Its totient is φ = 19077120.

The previous prime is 43661687. The next prime is 43661699. The reversal of 43661696 is 69616634.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43661699) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30926 + ... + 32306.

Almost surely, 2^43661696 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43661696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49337400).

43661696 is an abundant number, since it is smaller than the sum of its proper divisors (55013104).

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

43661696 is a wasteful number, since it uses less digits than its factorization.

43661696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1427 (or 1415 counting only the distinct ones).

The product of its digits is 139968, while the sum is 41.

The square root of 43661696 is about 6607.6997510480. The cubic root of 43661696 is about 352.1277084817.

The spelling of 43661696 in words is "forty-three million, six hundred sixty-one thousand, six hundred ninety-six".