400235441 has 2 divisors, whose sum is σ = 400235442. Its totient is φ = 400235440.

The previous prime is 400235431. The next prime is 400235447. The reversal of 400235441 is 144532004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 326344225 + 73891216 = 18065^2 + 8596^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400235441 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (400235447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200117720 + 200117721.

It is an arithmetic number, because the mean of its divisors is an integer number (200117721).

Almost surely, 2^400235441 is an apocalyptic number.

It is an amenable number.

400235441 is a deficient number, since it is larger than the sum of its proper divisors (1).

400235441 is an equidigital number, since it uses as much as digits as its factorization.

400235441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 400235441 is about 20005.8851591226. The cubic root of 400235441 is about 736.9508333842.

Adding to 400235441 its reverse (144532004), we get a palindrome (544767445).

The spelling of 400235441 in words is "four hundred million, two hundred thirty-five thousand, four hundred forty-one".