128260872 has 48 divisors (see below), whose sum is σ = 348192000. Its totient is φ = 42652896.

The previous prime is 128260871. The next prime is 128260883. The reversal of 128260872 is 278062821.

It is a happy number.

It is a super-3 number, since 3×128260872³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (128260871) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32629 + ... + 36347.

It is an arithmetic number, because the mean of its divisors is an integer number (7254000).

Almost surely, 2^128260872 is an apocalyptic number.

128260872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128260872 is an abundant number, since it is smaller than the sum of its proper divisors (219931128).

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

128260872 is a wasteful number, since it uses less digits than its factorization.

128260872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4210 (or 4203 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 128260872 is about 11325.2316532599. The cubic root of 128260872 is about 504.3105606744.

The spelling of 128260872 in words is "one hundred twenty-eight million, two hundred sixty thousand, eight hundred seventy-two".