128329636 has 6 divisors (see below), whose sum is σ = 224576870. Its totient is φ = 64164816.

The previous prime is 128329633. The next prime is 128329637. The reversal of 128329636 is 636923821.

It can be written as a sum of positive squares in only one way, i.e., 116769636 + 11560000 = 10806^2 + 3400^2 .

It is not an unprimeable number, because it can be changed into a prime (128329633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16041201 + ... + 16041208.

Almost surely, 2^128329636 is an apocalyptic number.

It is an amenable number.

128329636 is a deficient number, since it is larger than the sum of its proper divisors (96247234).

128329636 is a wasteful number, since it uses less digits than its factorization.

128329636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32082413 (or 32082411 counting only the distinct ones).

The product of its digits is 93312, while the sum is 40.

The square root of 128329636 is about 11328.2671225567. The cubic root of 128329636 is about 504.4006692564.

The spelling of 128329636 in words is "one hundred twenty-eight million, three hundred twenty-nine thousand, six hundred thirty-six".