128489460 has 48 divisors (see below), whose sum is σ = 392478912. Its totient is φ = 31148800.

The previous prime is 128489453. The next prime is 128489467. The reversal of 128489460 is 64984821.

It is an interprime number because it is at equal distance from previous prime (128489453) and next prime (128489467).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128489467) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96681 + ... + 98000.

It is an arithmetic number, because the mean of its divisors is an integer number (8176644).

Almost surely, 2^128489460 is an apocalyptic number.

128489460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128489460 is an abundant number, since it is smaller than the sum of its proper divisors (263989452).

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

128489460 is a wasteful number, since it uses less digits than its factorization.

128489460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194704 (or 194702 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 42.

The square root of 128489460 is about 11335.3191397508. The cubic root of 128489460 is about 504.6099788947.

The spelling of 128489460 in words is "one hundred twenty-eight million, four hundred eighty-nine thousand, four hundred sixty".