43728361 has 2 divisors, whose sum is σ = 43728362. Its totient is φ = 43728360.

The previous prime is 43728319. The next prime is 43728407. The reversal of 43728361 is 16382734.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39501225 + 4227136 = 6285^2 + 2056^2 .

It is a cyclic number.

It is not a de Polignac number, because 43728361 - 2¹³ = 43720169 is a prime.

It is not a weakly prime, because it can be changed into another prime (43728161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21864180 + 21864181.

It is an arithmetic number, because the mean of its divisors is an integer number (21864181).

Almost surely, 2^43728361 is an apocalyptic number.

It is an amenable number.

43728361 is a deficient number, since it is larger than the sum of its proper divisors (1).

43728361 is an equidigital number, since it uses as much as digits as its factorization.

43728361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 34.

The square root of 43728361 is about 6612.7423207018. The cubic root of 43728361 is about 352.3068331190.

The spelling of 43728361 in words is "forty-three million, seven hundred twenty-eight thousand, three hundred sixty-one".