402444401 has 8 divisors (see below), whose sum is σ = 413708544. Its totient is φ = 391335840.

The previous prime is 402444379. The next prime is 402444421. The reversal of 402444401 is 104444204.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 402444401 - 2¹⁴ = 402428017 is a prime.

It is a super-2 number, since 2×402444401² = 323922991792497602, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (402444421) 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 7 ways as a sum of consecutive naturals, for example, 33641 + ... + 44006.

It is an arithmetic number, because the mean of its divisors is an integer number (51713568).

Almost surely, 2^402444401 is an apocalyptic number.

It is an amenable number.

402444401 is a deficient number, since it is larger than the sum of its proper divisors (11264143).

402444401 is an equidigital number, since it uses as much as digits as its factorization.

402444401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77791.

The product of its (nonzero) digits is 2048, while the sum is 23.

The square root of 402444401 is about 20061.0169483005. The cubic root of 402444401 is about 738.3041278283.

Adding to 402444401 its reverse (104444204), we get a palindrome (506888605).

The spelling of 402444401 in words is "four hundred two million, four hundred forty-four thousand, four hundred one".