6400042420 has 24 divisors (see below), whose sum is σ = 13444419744. Its totient is φ = 2559192096.

The previous prime is 6400042387. The next prime is 6400042447. The reversal of 6400042420 is 242400046.

It is a junction number, because it is equal to n+sod(n) for n = 6400042391 and 6400042400.

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, 14107 + ... + 114013.

It is an arithmetic number, because the mean of its divisors is an integer number (560184156).

Almost surely, 2^6400042420 is an apocalyptic number.

It is an amenable number.

6400042420 is an abundant number, since it is smaller than the sum of its proper divisors (7044377324).

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

6400042420 is a wasteful number, since it uses less digits than its factorization.

6400042420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103119 (or 103117 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 6400042420 is about 80000.2651245607. The cubic root of 6400042420 is about 1856.6396354402.

Adding to 6400042420 its reverse (242400046), we get a palindrome (6642442466).

The spelling of 6400042420 in words is "six billion, four hundred million, forty-two thousand, four hundred twenty".