43684380 has 48 divisors (see below), whose sum is σ = 135908640. Its totient is φ = 11649024.

The previous prime is 43684379. The next prime is 43684391. The reversal of 43684380 is 8348634.

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 (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39909 + ... + 40988.

It is an arithmetic number, because the mean of its divisors is an integer number (2831430).

Almost surely, 2^43684380 is an apocalyptic number.

It is an amenable number.

43684380 is an abundant number, since it is smaller than the sum of its proper divisors (92224260).

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

43684380 is a wasteful number, since it uses less digits than its factorization.

43684380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80915 (or 80907 counting only the distinct ones).

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

The square root of 43684380 is about 6609.4160105111. The cubic root of 43684380 is about 352.1886794071.

The spelling of 43684380 in words is "forty-three million, six hundred eighty-four thousand, three hundred eighty".