43920681 has 8 divisors (see below), whose sum is σ = 66926784. Its totient is φ = 25097520.

The previous prime is 43920677. The next prime is 43920683. The reversal of 43920681 is 18602934.

43920681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 43920681 - 2² = 43920677 is a prime.

It is a super-2 number, since 2×43920681² = 3858052439007522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (43920683) 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 7 ways as a sum of consecutive naturals, for example, 1045710 + ... + 1045751.

It is an arithmetic number, because the mean of its divisors is an integer number (8365848).

Almost surely, 2^43920681 is an apocalyptic number.

It is an amenable number.

43920681 is a deficient number, since it is larger than the sum of its proper divisors (23006103).

43920681 is a wasteful number, since it uses less digits than its factorization.

43920681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2091471.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 43920681 is about 6627.2679891491. The cubic root of 43920681 is about 352.8225667637.

The spelling of 43920681 in words is "forty-three million, nine hundred twenty thousand, six hundred eighty-one".