402442404 has 72 divisors (see below), whose sum is σ = 1162123200. Its totient is φ = 106134912.

The previous prime is 402442393. The next prime is 402442421. The reversal of 402442404 is 404244204.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22 + ... + 28370.

It is an arithmetic number, because the mean of its divisors is an integer number (16140600).

Almost surely, 2^402442404 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402442404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (581061600).

402442404 is an abundant number, since it is smaller than the sum of its proper divisors (759680796).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

402442404 is a wasteful number, since it uses less digits than its factorization.

402442404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28389 (or 28374 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 24.

The square root of 402442404 is about 20060.9671750890. The cubic root of 402442404 is about 738.3029066279.

Adding to 402442404 its reverse (404244204), we get a palindrome (806686608).

The spelling of 402442404 in words is "four hundred two million, four hundred forty-two thousand, four hundred four".