42040400424 has 64 divisors (see below), whose sum is σ = 114801891840. Its totient is φ = 12723264960.

The previous prime is 42040400329. The next prime is 42040400429. The reversal of 42040400424 is 42400404024.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 42040400394 and 42040400403.

It is not an unprimeable number, because it can be changed into a prime (42040400429) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 106597 + ... + 308939.

It is an arithmetic number, because the mean of its divisors is an integer number (1793779560).

Almost surely, 2^42040400424 is an apocalyptic number.

42040400424 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

42040400424 is an abundant number, since it is smaller than the sum of its proper divisors (72761491416).

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

42040400424 is a wasteful number, since it uses less digits than its factorization.

42040400424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203150 (or 203146 counting only the distinct ones).

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

Adding to 42040400424 its reverse (42400404024), we get a palindrome (84440804448).

The spelling of 42040400424 in words is "forty-two billion, forty million, four hundred thousand, four hundred twenty-four".