402404404 has 6 divisors (see below), whose sum is σ = 704207714. Its totient is φ = 201202200.

The previous prime is 402404383. The next prime is 402404407. The reversal of 402404404 is 404404204.

It can be written as a sum of positive squares in only one way, i.e., 232623504 + 169780900 = 15252^2 + 13030^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402404407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50300547 + ... + 50300554.

Almost surely, 2^402404404 is an apocalyptic number.

It is an amenable number.

402404404 is a deficient number, since it is larger than the sum of its proper divisors (301803310).

402404404 is a wasteful number, since it uses less digits than its factorization.

402404404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100601105 (or 100601103 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 22.

The square root of 402404404 is about 20060.0200398703. The cubic root of 402404404 is about 738.2796681941.

Adding to 402404404 its reverse (404404204), we get a palindrome (806808608).

It can be divided in two parts, 40240 and 4404, that added together give a palindrome (44644).

The spelling of 402404404 in words is "four hundred two million, four hundred four thousand, four hundred four".