128489652 has 72 divisors (see below), whose sum is σ = 342023136. Its totient is φ = 42169248.

The previous prime is 128489651. The next prime is 128489657. The reversal of 128489652 is 256984821.

It is a super-2 number, since 2×128489652² = 33019181342162208, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 128489598 and 128489607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128489651) 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 23 ways as a sum of consecutive naturals, for example, 64138 + ... + 66110.

Almost surely, 2^128489652 is an apocalyptic number.

128489652 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128489652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171011568).

128489652 is an abundant number, since it is smaller than the sum of its proper divisors (213533484).

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

128489652 is a wasteful number, since it uses less digits than its factorization.

128489652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2059 (or 2045 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 128489652 is about 11335.3276088519. The cubic root of 128489652 is about 504.6102302385.

It can be divided in two parts, 12848 and 9652, that added together give a square (22500 = 150²).

The spelling of 128489652 in words is "one hundred twenty-eight million, four hundred eighty-nine thousand, six hundred fifty-two".