42400420044 has 24 divisors (see below), whose sum is σ = 99124221168. Its totient is φ = 14106343680.

The previous prime is 42400419979. The next prime is 42400420061. The reversal of 42400420044 is 44002400424.

It is a junction number, because it is equal to n+sod(n) for n = 42400419996 and 42400420023.

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, 3384697 + ... + 3397200.

It is an arithmetic number, because the mean of its divisors is an integer number (4130175882).

Almost surely, 2^42400420044 is an apocalyptic number.

It is an amenable number.

42400420044 is an abundant number, since it is smaller than the sum of its proper divisors (56723801124).

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

42400420044 is a wasteful number, since it uses less digits than its factorization.

42400420044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6782425 (or 6782423 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 24.

Adding to 42400420044 its reverse (44002400424), we get a palindrome (86402820468).

The spelling of 42400420044 in words is "forty-two billion, four hundred million, four hundred twenty thousand, forty-four".