43728961 has 4 divisors (see below), whose sum is σ = 43823872. Its totient is φ = 43634052.

The previous prime is 43728953. The next prime is 43728977. The reversal of 43728961 is 16982734.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 43728961 - 2³ = 43728953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43728901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46761 + ... + 47686.

It is an arithmetic number, because the mean of its divisors is an integer number (10955968).

Almost surely, 2^43728961 is an apocalyptic number.

It is an amenable number.

43728961 is a deficient number, since it is larger than the sum of its proper divisors (94911).

43728961 is an equidigital number, since it uses as much as digits as its factorization.

43728961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94910.

The product of its digits is 72576, while the sum is 40.

The square root of 43728961 is about 6612.7876875037. The cubic root of 43728961 is about 352.3084444542.

The spelling of 43728961 in words is "forty-three million, seven hundred twenty-eight thousand, nine hundred sixty-one".