404242002 has 20 divisors (see below), whose sum is σ = 905801886. Its totient is φ = 134747280.

The previous prime is 404241977. The next prime is 404242079. The reversal of 404242002 is 200242404.

404242002 is a `hidden beast` number, since 40 + 424 + 200 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 402443721 + 1798281 = 20061^2 + 1341^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1247499 + ... + 1247822.

Almost surely, 2^404242002 is an apocalyptic number.

404242002 is an abundant number, since it is smaller than the sum of its proper divisors (501559884).

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

404242002 is a wasteful number, since it uses less digits than its factorization.

404242002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2495335 (or 2495326 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 404242002 is about 20105.7703657433. The cubic root of 404242002 is about 739.4017577855.

Adding to 404242002 its reverse (200242404), we get a palindrome (604484406).

The spelling of 404242002 in words is "four hundred four million, two hundred forty-two thousand, two".