33031240040 has 32 divisors (see below), whose sum is σ = 78692073480. Its totient is φ = 12435290112.

The previous prime is 33031240037. The next prime is 33031240049. The reversal of 33031240040 is 4004213033.

It can be written as a sum of positive squares in 4 ways, for example, as 33006895684 + 24344356 = 181678^2 + 4934^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 33031239994 and 33031240021.

It is not an unprimeable number, because it can be changed into a prime (33031240049) 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 7 ways as a sum of consecutive naturals, for example, 24286997 + ... + 24288356.

Almost surely, 2^33031240040 is an apocalyptic number.

It is an amenable number.

33031240040 is an abundant number, since it is smaller than the sum of its proper divisors (45660833440).

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

33031240040 is a wasteful number, since it uses less digits than its factorization.

33031240040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48575381 (or 48575377 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 33031240040 its reverse (4004213033), we get a palindrome (37035453073).

The spelling of 33031240040 in words is "thirty-three billion, thirty-one million, two hundred forty thousand, forty".