128730692 has 12 divisors (see below), whose sum is σ = 225358140. Its totient is φ = 64342656.

The previous prime is 128730653. The next prime is 128730703. The reversal of 128730692 is 296037821.

It can be written as a sum of positive squares in 2 ways, for example, as 71334916 + 57395776 = 8446^2 + 7576^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19784 + ... + 25472.

It is an arithmetic number, because the mean of its divisors is an integer number (18779845).

Almost surely, 2^128730692 is an apocalyptic number.

It is an amenable number.

128730692 is a deficient number, since it is larger than the sum of its proper divisors (96627448).

128730692 is a wasteful number, since it uses less digits than its factorization.

128730692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11350 (or 11348 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 128730692 is about 11345.9548738747. The cubic root of 128730692 is about 504.9255741052.

The spelling of 128730692 in words is "one hundred twenty-eight million, seven hundred thirty thousand, six hundred ninety-two".