128252996 has 6 divisors (see below), whose sum is σ = 224442750. Its totient is φ = 64126496.

The previous prime is 128252977. The next prime is 128253001. The reversal of 128252996 is 699252821.

It can be written as a sum of positive squares in only one way, i.e., 82555396 + 45697600 = 9086^2 + 6760^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16031621 + ... + 16031628.

It is an arithmetic number, because the mean of its divisors is an integer number (37407125).

Almost surely, 2^128252996 is an apocalyptic number.

It is an amenable number.

128252996 is a deficient number, since it is larger than the sum of its proper divisors (96189754).

128252996 is a wasteful number, since it uses less digits than its factorization.

128252996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32063253 (or 32063251 counting only the distinct ones).

The product of its digits is 155520, while the sum is 44.

The square root of 128252996 is about 11324.8839287650. The cubic root of 128252996 is about 504.3002378814.

The spelling of 128252996 in words is "one hundred twenty-eight million, two hundred fifty-two thousand, nine hundred ninety-six".