402420202420 has 48 divisors (see below), whose sum is σ = 882738033408. Its totient is φ = 153810074880.

The previous prime is 402420202409. The next prime is 402420202433. The reversal of 402420202420 is 24202024204.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 402420202391 and 402420202400.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7521 + ... + 897160.

It is an arithmetic number, because the mean of its divisors is an integer number (18390375696).

Almost surely, 2^402420202420 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 402420202420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (441369016704).

402420202420 is an abundant number, since it is smaller than the sum of its proper divisors (480317830988).

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

402420202420 is a wasteful number, since it uses less digits than its factorization.

402420202420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 905680 (or 905678 counting only the distinct ones).

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

Adding to 402420202420 its reverse (24202024204), we get a palindrome (426622226624).

The spelling of 402420202420 in words is "four hundred two billion, four hundred twenty million, two hundred two thousand, four hundred twenty".