43688412 has 36 divisors (see below), whose sum is σ = 111582016. Its totient is φ = 14411520.

The previous prime is 43688357. The next prime is 43688441. The reversal of 43688412 is 21488634.

43688412 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

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

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 2764 + ... + 9747.

Almost surely, 2^43688412 is an apocalyptic number.

It is an amenable number.

43688412 is an abundant number, since it is smaller than the sum of its proper divisors (67893604).

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

43688412 is a wasteful number, since it uses less digits than its factorization.

43688412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12618 (or 12613 counting only the distinct ones).

The product of its digits is 36864, while the sum is 36.

The square root of 43688412 is about 6609.7210228572. The cubic root of 43688412 is about 352.1995145620.

Adding to 43688412 its product of digits (36864), we get a triangular number (43725276 = T₉₃₅₁).

It can be divided in two parts, 43688 and 412, that added together give a square (44100 = 210²).

The spelling of 43688412 in words is "forty-three million, six hundred eighty-eight thousand, four hundred twelve".