31088780328 has 64 divisors (see below), whose sum is σ = 82591220160. Its totient is φ = 9718096896.

The previous prime is 31088780321. The next prime is 31088780339. The reversal of 31088780328 is 82308788013.

It is not an unprimeable number, because it can be changed into a prime (31088780321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24526 + ... + 250557.

It is an arithmetic number, because the mean of its divisors is an integer number (1290487815).

Almost surely, 2^31088780328 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 31088780328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41295610080).

31088780328 is an abundant number, since it is smaller than the sum of its proper divisors (51502439832).

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

31088780328 is a wasteful number, since it uses less digits than its factorization.

31088780328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275386 (or 275382 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 48.

The spelling of 31088780328 in words is "thirty-one billion, eighty-eight million, seven hundred eighty thousand, three hundred twenty-eight".