128698172 has 24 divisors (see below), whose sum is σ = 245254800. Its totient is φ = 58859136.

The previous prime is 128698169. The next prime is 128698181. The reversal of 128698172 is 271896821.

It is a super-2 number, since 2×128698172² = 33126438952283168, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26993 + ... + 31400.

It is an arithmetic number, because the mean of its divisors is an integer number (10218950).

Almost surely, 2^128698172 is an apocalyptic number.

It is an amenable number.

128698172 is a deficient number, since it is larger than the sum of its proper divisors (116556628).

128698172 is a wasteful number, since it uses less digits than its factorization.

128698172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58445 (or 58443 counting only the distinct ones).

The product of its digits is 96768, while the sum is 44.

The square root of 128698172 is about 11344.5216734775. The cubic root of 128698172 is about 504.8830523561.

The spelling of 128698172 in words is "one hundred twenty-eight million, six hundred ninety-eight thousand, one hundred seventy-two".