43680028 has 18 divisors (see below), whose sum is σ = 87430056. Its totient is φ = 18705024.

The previous prime is 43679989. The next prime is 43680029. The reversal of 43680028 is 82008634.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43680029) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34348 + ... + 35596.

Almost surely, 2^43680028 is an apocalyptic number.

It is an amenable number.

43680028 is an abundant number, since it is smaller than the sum of its proper divisors (43750028).

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

43680028 is an equidigital number, since it uses as much as digits as its factorization.

43680028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2509 (or 1258 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 43680028 is about 6609.0867750393. The cubic root of 43680028 is about 352.1769835711.

The spelling of 43680028 in words is "forty-three million, six hundred eighty thousand, twenty-eight".