128320264 has 16 divisors (see below), whose sum is σ = 242439120. Its totient is φ = 63669840.

The previous prime is 128320249. The next prime is 128320277. The reversal of 128320264 is 462023821.

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, 60174 + ... + 62269.

It is an arithmetic number, because the mean of its divisors is an integer number (15152445).

Almost surely, 2^128320264 is an apocalyptic number.

It is an amenable number.

128320264 is a deficient number, since it is larger than the sum of its proper divisors (114118856).

128320264 is a wasteful number, since it uses less digits than its factorization.

128320264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122580 (or 122576 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 128320264 is about 11327.8534595041. The cubic root of 128320264 is about 504.3883900502.

The spelling of 128320264 in words is "one hundred twenty-eight million, three hundred twenty thousand, two hundred sixty-four".