128917704 has 16 divisors (see below), whose sum is σ = 322294320. Its totient is φ = 42972560.

The previous prime is 128917699. The next prime is 128917709. The reversal of 128917704 is 407719821.

It is an interprime number because it is at equal distance from previous prime (128917699) and next prime (128917709).

It is not an unprimeable number, because it can be changed into a prime (128917709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2685762 + ... + 2685809.

It is an arithmetic number, because the mean of its divisors is an integer number (20143395).

Almost surely, 2^128917704 is an apocalyptic number.

It is an amenable number.

128917704 is an abundant number, since it is smaller than the sum of its proper divisors (193376616).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128917704 is a wasteful number, since it uses less digits than its factorization.

128917704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5371580 (or 5371576 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 39.

The square root of 128917704 is about 11354.1932342197. The cubic root of 128917704 is about 505.1699640298.

The spelling of 128917704 in words is "one hundred twenty-eight million, nine hundred seventeen thousand, seven hundred four".