40042000424 has 16 divisors (see below), whose sum is σ = 75104082900. Its totient is φ = 20014244992.

The previous prime is 40042000409. The next prime is 40042000429. The reversal of 40042000424 is 42400024004.

It can be written as a sum of positive squares in 2 ways, for example, as 39647977924 + 394022500 = 199118^2 + 19850^2 .

It is a junction number, because it is equal to n+sod(n) for n = 40042000396 and 40042000405.

It is not an unprimeable number, because it can be changed into a prime (40042000429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 819167 + ... + 866670.

Almost surely, 2^40042000424 is an apocalyptic number.

It is an amenable number.

40042000424 is a deficient number, since it is larger than the sum of its proper divisors (35062082476).

40042000424 is a wasteful number, since it uses less digits than its factorization.

40042000424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1688812 (or 1688808 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

Adding to 40042000424 its reverse (42400024004), we get a palindrome (82442024428).

The spelling of 40042000424 in words is "forty billion, forty-two million, four hundred twenty-four", and thus it is an aban number.