40440401 has 2 divisors, whose sum is σ = 40440402. Its totient is φ = 40440400.

The previous prime is 40440397. The next prime is 40440403. The reversal of 40440401 is 10404404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39438400 + 1002001 = 6280^2 + 1001^2 .

It is a cyclic number.

It is not a de Polignac number, because 40440401 - 2² = 40440397 is a prime.

Together with 40440403, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40440401.

It is not a weakly prime, because it can be changed into another prime (40440403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20220200 + 20220201.

It is an arithmetic number, because the mean of its divisors is an integer number (20220201).

Almost surely, 2^40440401 is an apocalyptic number.

It is an amenable number.

40440401 is a deficient number, since it is larger than the sum of its proper divisors (1).

40440401 is an equidigital number, since it uses as much as digits as its factorization.

40440401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 40440401 is about 6359.2767670546. The cubic root of 40440401 is about 343.2457361805.

Adding to 40440401 its reverse (10404404), we get a palindrome (50844805).

The spelling of 40440401 in words is "forty million, four hundred forty thousand, four hundred one".