128077732 has 6 divisors (see below), whose sum is σ = 224136038. Its totient is φ = 64038864.

The previous prime is 128077721. The next prime is 128077751. The reversal of 128077732 is 237770821.

It can be written as a sum of positive squares in only one way, i.e., 88059456 + 40018276 = 9384^2 + 6326^2 .

It is a junction number, because it is equal to n+sod(n) for n = 128077691 and 128077700.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16009713 + ... + 16009720.

Almost surely, 2^128077732 is an apocalyptic number.

It is an amenable number.

128077732 is a deficient number, since it is larger than the sum of its proper divisors (96058306).

128077732 is a wasteful number, since it uses less digits than its factorization.

128077732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32019437 (or 32019435 counting only the distinct ones).

The product of its (nonzero) digits is 32928, while the sum is 37.

The square root of 128077732 is about 11317.1432791142. The cubic root of 128077732 is about 504.0704161713.

The spelling of 128077732 in words is "one hundred twenty-eight million, seventy-seven thousand, seven hundred thirty-two".