128143616 has 36 divisors (see below), whose sum is σ = 259328412. Its totient is φ = 63184896.

The previous prime is 128143607. The next prime is 128143621. The reversal of 128143616 is 616341821.

It can be written as a sum of positive squares in 2 ways, for example, as 26214400 + 101929216 = 5120^2 + 10096^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15260 + ... + 22116.

It is an arithmetic number, because the mean of its divisors is an integer number (7203567).

Almost surely, 2^128143616 is an apocalyptic number.

128143616 is a gapful number since it is divisible by the number (16) 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 128143616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129664206).

128143616 is an abundant number, since it is smaller than the sum of its proper divisors (131184796).

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

128143616 is an frugal number, since it uses more digits than its factorization.

128143616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6946 (or 6932 counting only the distinct ones).

The product of its digits is 6912, while the sum is 32.

The square root of 128143616 is about 11320.0537101199. The cubic root of 128143616 is about 504.1568336978.

The spelling of 128143616 in words is "one hundred twenty-eight million, one hundred forty-three thousand, six hundred sixteen".