128251340 has 96 divisors (see below), whose sum is σ = 329011200. Its totient is φ = 41045760.

The previous prime is 128251339. The next prime is 128251373. The reversal of 128251340 is 43152821.

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, 125351 + ... + 126369.

It is an arithmetic number, because the mean of its divisors is an integer number (3427200).

Almost surely, 2^128251340 is an apocalyptic number.

128251340 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 128251340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (164505600).

128251340 is an abundant number, since it is smaller than the sum of its proper divisors (200759860).

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

128251340 is a wasteful number, since it uses less digits than its factorization.

128251340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1095 (or 1093 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 128251340 is about 11324.8108151969. The cubic root of 128251340 is about 504.2980673674.

The spelling of 128251340 in words is "one hundred twenty-eight million, two hundred fifty-one thousand, three hundred forty".