40424424242 has 4 divisors (see below), whose sum is σ = 60636636366. Its totient is φ = 20212212120.

The previous prime is 40424424223. The next prime is 40424424283. The reversal of 40424424242 is 24242442404.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 28740759961 + 11683664281 = 169531^2 + 108091^2 .

It is a junction number, because it is equal to n+sod(n) for n = 40424424199 and 40424424208.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10106106059 + ... + 10106106062.

Almost surely, 2^40424424242 is an apocalyptic number.

40424424242 is a deficient number, since it is larger than the sum of its proper divisors (20212212124).

40424424242 is a wasteful number, since it uses less digits than its factorization.

40424424242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20212212123.

The product of its (nonzero) digits is 65536, while the sum is 32.

Adding to 40424424242 its reverse (24242442404), we get a palindrome (64666866646).

The spelling of 40424424242 in words is "forty billion, four hundred twenty-four million, four hundred twenty-four thousand, two hundred forty-two".