402422420424 has 32 divisors (see below), whose sum is σ = 1006163269920. Its totient is φ = 134126510976.

The previous prime is 402422420417. The next prime is 402422420489. The reversal of 402422420424 is 424024224204.

It is a happy number.

It is a super-2 number, since 2×402422420424² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 402422420391 and 402422420400.

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, 662382 + ... + 1115165.

It is an arithmetic number, because the mean of its divisors is an integer number (31442602185).

Almost surely, 2^402422420424 is an apocalyptic number.

It is an amenable number.

402422420424 is an abundant number, since it is smaller than the sum of its proper divisors (603740849496).

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

402422420424 is a wasteful number, since it uses less digits than its factorization.

402422420424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1786989 (or 1786985 counting only the distinct ones).

The product of its (nonzero) digits is 32768, while the sum is 30.

Adding to 402422420424 its reverse (424024224204), we get a palindrome (826446644628).

The spelling of 402422420424 in words is "four hundred two billion, four hundred twenty-two million, four hundred twenty thousand, four hundred twenty-four".