402404442 has 32 divisors (see below), whose sum is σ = 881012160. Its totient is φ = 121518720.

The previous prime is 402404441. The next prime is 402404473. The reversal of 402404442 is 244404204.

It is not an unprimeable number, because it can be changed into a prime (402404441) 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 15 ways as a sum of consecutive naturals, for example, 8934 + ... + 29742.

It is an arithmetic number, because the mean of its divisors is an integer number (27531630).

Almost surely, 2^402404442 is an apocalyptic number.

402404442 is an abundant number, since it is smaller than the sum of its proper divisors (478607718).

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

402404442 is a wasteful number, since it uses less digits than its factorization.

402404442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21118.

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

The square root of 402404442 is about 20060.0209870279. The cubic root of 402404442 is about 738.2796914332.

Adding to 402404442 its reverse (244404204), we get a palindrome (646808646).

The spelling of 402404442 in words is "four hundred two million, four hundred four thousand, four hundred forty-two".