31788443028 has 24 divisors (see below), whose sum is σ = 74853523360. Its totient is φ = 10498934880.

The previous prime is 31788443023. The next prime is 31788443041. The reversal of 31788443028 is 82034488713.

It is a super-2 number, since 2×31788443028² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31788443023) 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 7 ways as a sum of consecutive naturals, for example, 12150238 + ... + 12152853.

Almost surely, 2^31788443028 is an apocalyptic number.

It is an amenable number.

31788443028 is an abundant number, since it is smaller than the sum of its proper divisors (43065080332).

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

31788443028 is a wasteful number, since it uses less digits than its factorization.

31788443028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24303207 (or 24303205 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 48.

The spelling of 31788443028 in words is "thirty-one billion, seven hundred eighty-eight million, four hundred forty-three thousand, twenty-eight".