43726640 has 20 divisors (see below), whose sum is σ = 101664624. Its totient is φ = 17490624.

The previous prime is 43726607. The next prime is 43726649. The reversal of 43726640 is 4662734.

43726640 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 (20).

It is a junction number, because it is equal to n+sod(n) for n = 43726597 and 43726606.

It is not an unprimeable number, because it can be changed into a prime (43726649) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 273212 + ... + 273371.

Almost surely, 2^43726640 is an apocalyptic number.

43726640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43726640 is an abundant number, since it is smaller than the sum of its proper divisors (57937984).

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

43726640 is a wasteful number, since it uses less digits than its factorization.

43726640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546596 (or 546590 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 32.

The square root of 43726640 is about 6612.6121918649. The cubic root of 43726640 is about 352.3022111910.

The spelling of 43726640 in words is "forty-three million, seven hundred twenty-six thousand, six hundred forty".