31442403040 has 96 divisors (see below), whose sum is σ = 78819713280. Its totient is φ = 11811938304.

The previous prime is 31442402983. The next prime is 31442403043. The reversal of 31442403040 is 4030424413.

It is a junction number, because it is equal to n+sod(n) for n = 31442402996 and 31442403014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31442403043) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1290814 + ... + 1314946.

It is an arithmetic number, because the mean of its divisors is an integer number (821038680).

Almost surely, 2^31442403040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31442403040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39409856640).

31442403040 is an abundant number, since it is smaller than the sum of its proper divisors (47377310240).

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

31442403040 is a wasteful number, since it uses less digits than its factorization.

31442403040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24644 (or 24636 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 31442403040 its reverse (4030424413), we get a palindrome (35472827453).

The spelling of 31442403040 in words is "thirty-one billion, four hundred forty-two million, four hundred three thousand, forty".