128688052 has 12 divisors (see below), whose sum is σ = 225916740. Its totient is φ = 64140416.

The previous prime is 128688031. The next prime is 128688061. The reversal of 128688052 is 250886821.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 42458256 + 86229796 = 6516^2 + 9286^2 .

It is a super-2 number, since 2×128688052² = 33121229455109408, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 128687996 and 128688014.

It is a congruent number.

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, 49477 + ... + 52012.

It is an arithmetic number, because the mean of its divisors is an integer number (18826395).

Almost surely, 2^128688052 is an apocalyptic number.

It is an amenable number.

128688052 is a deficient number, since it is larger than the sum of its proper divisors (97228688).

128688052 is a wasteful number, since it uses less digits than its factorization.

128688052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101810 (or 101808 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 40.

The square root of 128688052 is about 11344.0756344446. The cubic root of 128688052 is about 504.8698184193.

The spelling of 128688052 in words is "one hundred twenty-eight million, six hundred eighty-eight thousand, fifty-two".