128620050 has 96 divisors (see below), whose sum is σ = 348727680. Its totient is φ = 31180800.

The previous prime is 128620043. The next prime is 128620069. The reversal of 128620050 is 50026821.

It is a self number, because there is not a number n which added to its sum of digits gives 128620050.

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 47 ways as a sum of consecutive naturals, for example, 137986 + ... + 138914.

It is an arithmetic number, because the mean of its divisors is an integer number (3632580).

Almost surely, 2^128620050 is an apocalyptic number.

128620050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 128620050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174363840).

128620050 is an abundant number, since it is smaller than the sum of its proper divisors (220107630).

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

128620050 is a wasteful number, since it uses less digits than its factorization.

128620050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1028 (or 1023 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 128620050 is about 11341.0779910906. The cubic root of 128620050 is about 504.7808741183.

Adding to 128620050 its reverse (50026821), we get a palindrome (178646871).

The spelling of 128620050 in words is "one hundred twenty-eight million, six hundred twenty thousand, fifty".