128617696 has 24 divisors (see below), whose sum is σ = 253792224. Its totient is φ = 64162560.

The previous prime is 128617693. The next prime is 128617717. The reversal of 128617696 is 696716821.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128617693) 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, 10476 + ... + 19156.

It is an arithmetic number, because the mean of its divisors is an integer number (10574676).

Almost surely, 2^128617696 is an apocalyptic number.

128617696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

128617696 is a deficient number, since it is larger than the sum of its proper divisors (125174528).

128617696 is an equidigital number, since it uses as much as digits as its factorization.

128617696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9154 (or 9146 counting only the distinct ones).

The product of its digits is 217728, while the sum is 46.

The square root of 128617696 is about 11340.9742085943. The cubic root of 128617696 is about 504.7777946051. Note that the first 4 decimals are identical.

The spelling of 128617696 in words is "one hundred twenty-eight million, six hundred seventeen thousand, six hundred ninety-six".