40028101 has 2 divisors, whose sum is σ = 40028102. Its totient is φ = 40028100.

The previous prime is 40028089. The next prime is 40028111. The reversal of 40028101 is 10182004.

It is a happy number.

40028101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35988001 + 4040100 = 5999^2 + 2010^2 .

It is a cyclic number.

It is not a de Polignac number, because 40028101 - 2⁵ = 40028069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40028111) 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 as a sum of consecutive naturals, namely, 20014050 + 20014051.

It is an arithmetic number, because the mean of its divisors is an integer number (20014051).

Almost surely, 2^40028101 is an apocalyptic number.

It is an amenable number.

40028101 is a deficient number, since it is larger than the sum of its proper divisors (1).

40028101 is an equidigital number, since it uses as much as digits as its factorization.

40028101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 40028101 is about 6326.7765094082. The cubic root of 40028101 is about 342.0752573118.

The spelling of 40028101 in words is "forty million, twenty-eight thousand, one hundred one".