128937960 has 128 divisors (see below), whose sum is σ = 432345600. Its totient is φ = 34179840.

The previous prime is 128937943. The next prime is 128937997. The reversal of 128937960 is 69739821.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 298945 + ... + 299375.

It is an arithmetic number, because the mean of its divisors is an integer number (3377700).

Almost surely, 2^128937960 is an apocalyptic number.

128937960 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 128937960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (216172800).

128937960 is an abundant number, since it is smaller than the sum of its proper divisors (303407640).

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

128937960 is a wasteful number, since it uses less digits than its factorization.

128937960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728 (or 718 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 128937960 is about 11355.0852044359. The cubic root of 128937960 is about 505.1964206674.

The spelling of 128937960 in words is "one hundred twenty-eight million, nine hundred thirty-seven thousand, nine hundred sixty".