42321440040 has 128 divisors (see below), whose sum is σ = 138944833920. Its totient is φ = 10227276800.

The previous prime is 42321440017. The next prime is 42321440069. The reversal of 42321440040 is 4004412324.

It is a happy number.

It is a super-2 number, since 2×42321440040² (a number of 22 digits) contains 22 as substring.

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

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 in 31 ways as a sum of consecutive naturals, for example, 367870 + ... + 469010.

It is an arithmetic number, because the mean of its divisors is an integer number (1085506515).

Almost surely, 2^42321440040 is an apocalyptic number.

42321440040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42321440040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69472416960).

42321440040 is an abundant number, since it is smaller than the sum of its proper divisors (96623393880).

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

42321440040 is a wasteful number, since it uses less digits than its factorization.

42321440040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101483 (or 101479 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 42321440040 its reverse (4004412324), we get a palindrome (46325852364).

The spelling of 42321440040 in words is "forty-two billion, three hundred twenty-one million, four hundred forty thousand, forty".