128660480 has 88 divisors (see below), whose sum is σ = 332547432. Its totient is φ = 47480832.

The previous prime is 128660461. The next prime is 128660491. The reversal of 128660480 is 84066821.

It can be written as a sum of positive squares in 4 ways, for example, as 6071296 + 122589184 = 2464^2 + 11072^2 .

It is a super-2 number, since 2×128660480² = 33107038227660800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 128660480.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65594 + ... + 67526.

Almost surely, 2^128660480 is an apocalyptic number.

128660480 is a gapful number since it is divisible by the number (10) 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 128660480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (166273716).

128660480 is an abundant number, since it is smaller than the sum of its proper divisors (203886952).

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

128660480 is a wasteful number, since it uses less digits than its factorization.

128660480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1971 (or 1953 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 128660480 is about 11342.8603094634. The cubic root of 128660480 is about 504.8337589595.

The spelling of 128660480 in words is "one hundred twenty-eight million, six hundred sixty thousand, four hundred eighty".