128315308 has 12 divisors (see below), whose sum is σ = 244965672. Its totient is φ = 58325120.

The previous prime is 128315287. The next prime is 128315309. The reversal of 128315308 is 803513821.

It is a self number, because there is not a number n which added to its sum of digits gives 128315308.

It is not an unprimeable number, because it can be changed into a prime (128315309) 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, 1458085 + ... + 1458172.

It is an arithmetic number, because the mean of its divisors is an integer number (20413806).

Almost surely, 2^128315308 is an apocalyptic number.

It is an amenable number.

128315308 is a deficient number, since it is larger than the sum of its proper divisors (116650364).

128315308 is a wasteful number, since it uses less digits than its factorization.

128315308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2916272 (or 2916270 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 128315308 is about 11327.6347045621. The cubic root of 128315308 is about 504.3818964512.

The spelling of 128315308 in words is "one hundred twenty-eight million, three hundred fifteen thousand, three hundred eight".