128003680 has 144 divisors (see below), whose sum is σ = 364558320. Its totient is φ = 42298368.

The previous prime is 128003677. The next prime is 128003719. The reversal of 128003680 is 86300821.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 227079 + ... + 227641.

It is an arithmetic number, because the mean of its divisors is an integer number (2531655).

Almost surely, 2^128003680 is an apocalyptic number.

128003680 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 128003680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (182279160).

128003680 is an abundant number, since it is smaller than the sum of its proper divisors (236554640).

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

128003680 is a wasteful number, since it uses less digits than its factorization.

128003680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621 (or 606 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 128003680 is about 11313.8711323755. The cubic root of 128003680 is about 503.9732496090.

The spelling of 128003680 in words is "one hundred twenty-eight million, three thousand, six hundred eighty".