128419860 has 96 divisors (see below), whose sum is σ = 381911040. Its totient is φ = 32151168.

The previous prime is 128419847. The next prime is 128419873. The reversal of 128419860 is 68914821.

It is an interprime number because it is at equal distance from previous prime (128419847) and next prime (128419873).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 144337 + ... + 145223.

It is an arithmetic number, because the mean of its divisors is an integer number (3978240).

Almost surely, 2^128419860 is an apocalyptic number.

128419860 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 128419860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (190955520).

128419860 is an abundant number, since it is smaller than the sum of its proper divisors (253491180).

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

128419860 is a wasteful number, since it uses less digits than its factorization.

128419860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1045 (or 1043 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 39.

The square root of 128419860 is about 11332.2486735864. The cubic root of 128419860 is about 504.5188502843.

The spelling of 128419860 in words is "one hundred twenty-eight million, four hundred nineteen thousand, eight hundred sixty".