40728041 has 2 divisors, whose sum is σ = 40728042. Its totient is φ = 40728040.

The previous prime is 40728029. The next prime is 40728043. The reversal of 40728041 is 14082704.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34987225 + 5740816 = 5915^2 + 2396^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40728041 is a prime.

It is a Sophie Germain prime.

Together with 40728043, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 40728041.

It is not a weakly prime, because it can be changed into another prime (40728043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20364020 + 20364021.

It is an arithmetic number, because the mean of its divisors is an integer number (20364021).

Almost surely, 2^40728041 is an apocalyptic number.

It is an amenable number.

40728041 is a deficient number, since it is larger than the sum of its proper divisors (1).

40728041 is an equidigital number, since it uses as much as digits as its factorization.

40728041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 40728041 is about 6381.8524740078. The cubic root of 40728041 is about 344.0576144035.

The spelling of 40728041 in words is "forty million, seven hundred twenty-eight thousand, forty-one".