402040401 has 32 divisors (see below), whose sum is σ = 629821440. Its totient is φ = 223382016.

The previous prime is 402040393. The next prime is 402040417. The reversal of 402040401 is 104040204.

It is not a de Polignac number, because 402040401 - 2³ = 402040393 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (402040421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 109345 + ... + 112961.

It is an arithmetic number, because the mean of its divisors is an integer number (19681920).

Almost surely, 2^402040401 is an apocalyptic number.

It is an amenable number.

402040401 is a deficient number, since it is larger than the sum of its proper divisors (227781039).

402040401 is a wasteful number, since it uses less digits than its factorization.

402040401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3773.

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 402040401 is about 20050.9451398182. The cubic root of 402040401 is about 738.0569924626.

Adding to 402040401 its reverse (104040204), we get a palindrome (506080605).

The spelling of 402040401 in words is "four hundred two million, forty thousand, four hundred one".