31348960728 has 16 divisors (see below), whose sum is σ = 78372401880. Its totient is φ = 10449653568.

The previous prime is 31348960723. The next prime is 31348960751. The reversal of 31348960728 is 82706984313.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31348960723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 653103325 + ... + 653103372.

Almost surely, 2^31348960728 is an apocalyptic number.

It is an amenable number.

31348960728 is an abundant number, since it is smaller than the sum of its proper divisors (47023441152).

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

31348960728 is a wasteful number, since it uses less digits than its factorization.

31348960728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1306206706 (or 1306206702 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 51.

The spelling of 31348960728 in words is "thirty-one billion, three hundred forty-eight million, nine hundred sixty thousand, seven hundred twenty-eight".