402424312220 has 24 divisors (see below), whose sum is σ = 965818349664. Its totient is φ = 137974049856.

The previous prime is 402424312219. The next prime is 402424312261. The reversal of 402424312220 is 22213424204.

It is a self number, because there is not a number n which added to its sum of digits gives 402424312220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1437229547 + ... + 1437229826.

It is an arithmetic number, because the mean of its divisors is an integer number (40242431236).

Almost surely, 2^402424312220 is an apocalyptic number.

It is an amenable number.

402424312220 is an abundant number, since it is smaller than the sum of its proper divisors (563394037444).

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

402424312220 is a wasteful number, since it uses less digits than its factorization.

402424312220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2874459389 (or 2874459387 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 26.

Adding to 402424312220 its reverse (22213424204), we get a palindrome (424637736424).

The spelling of 402424312220 in words is "four hundred two billion, four hundred twenty-four million, three hundred twelve thousand, two hundred twenty".