128408144 has 10 divisors (see below), whose sum is σ = 248790810. Its totient is φ = 64204064.

The previous prime is 128408081. The next prime is 128408153. The reversal of 128408144 is 441804821.

It can be written as a sum of positive squares in only one way, i.e., 118548544 + 9859600 = 10888^2 + 3140^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 128408144.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4012739 + ... + 4012770.

It is an arithmetic number, because the mean of its divisors is an integer number (24879081).

Almost surely, 2^128408144 is an apocalyptic number.

It is an amenable number.

128408144 is a deficient number, since it is larger than the sum of its proper divisors (120382666).

128408144 is an equidigital number, since it uses as much as digits as its factorization.

128408144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8025517 (or 8025511 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 32.

The square root of 128408144 is about 11331.7317299696. The cubic root of 128408144 is about 504.5035070640.

The spelling of 128408144 in words is "one hundred twenty-eight million, four hundred eight thousand, one hundred forty-four".