128194140 has 96 divisors (see below), whose sum is σ = 381024000. Its totient is φ = 32113152.

The previous prime is 128194139. The next prime is 128194153. The reversal of 128194140 is 41491821.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 128194098 and 128194107.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 158056 + ... + 158864.

It is an arithmetic number, because the mean of its divisors is an integer number (3969000).

Almost surely, 2^128194140 is an apocalyptic number.

128194140 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 128194140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (190512000).

128194140 is an abundant number, since it is smaller than the sum of its proper divisors (252829860).

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

128194140 is a wasteful number, since it uses less digits than its factorization.

128194140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 979 (or 977 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 128194140 is about 11322.2851050484. The cubic root of 128194140 is about 504.2230840340.

The spelling of 128194140 in words is "one hundred twenty-eight million, one hundred ninety-four thousand, one hundred forty".