402442424420 has 24 divisors (see below), whose sum is σ = 874271475000. Its totient is φ = 155426039552.

The previous prime is 402442424411. The next prime is 402442424473. The reversal of 402442424420 is 24424244204.

It can be written as a sum of positive squares in 4 ways, for example, as 102734352484 + 299708071936 = 320522^2 + 547456^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 346932545 + ... + 346933704.

It is an arithmetic number, because the mean of its divisors is an integer number (36427978125).

Almost surely, 2^402442424420 is an apocalyptic number.

It is an amenable number.

402442424420 is an abundant number, since it is smaller than the sum of its proper divisors (471829050580).

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

402442424420 is a wasteful number, since it uses less digits than its factorization.

402442424420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693866287 (or 693866285 counting only the distinct ones).

The product of its (nonzero) digits is 65536, while the sum is 32.

Adding to 402442424420 its reverse (24424244204), we get a palindrome (426866668624).

The spelling of 402442424420 in words is "four hundred two billion, four hundred forty-two million, four hundred twenty-four thousand, four hundred twenty".