402204401 has 4 divisors (see below), whose sum is σ = 402249204. Its totient is φ = 402159600.

The previous prime is 402204373. The next prime is 402204419. The reversal of 402204401 is 104402204.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 334158400 + 68046001 = 18280^2 + 8249^2 .

It is a cyclic number.

It is not a de Polignac number, because 402204401 - 2¹⁰ = 402203377 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 402204401.

It is not an unprimeable number, because it can be changed into a prime (402204431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3770 + ... + 28611.

It is an arithmetic number, because the mean of its divisors is an integer number (100562301).

Almost surely, 2^402204401 is an apocalyptic number.

It is an amenable number.

402204401 is a deficient number, since it is larger than the sum of its proper divisors (44803).

402204401 is a wasteful number, since it uses less digits than its factorization.

402204401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44802.

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

The square root of 402204401 is about 20055.0343056301. The cubic root of 402204401 is about 738.1573346934.

Adding to 402204401 its reverse (104402204), we get a palindrome (506606605).

The spelling of 402204401 in words is "four hundred two million, two hundred four thousand, four hundred one".