128408146 has 16 divisors (see below), whose sum is σ = 198336600. Its totient is φ = 62312320.

The previous prime is 128408081. The next prime is 128408153. The reversal of 128408146 is 641804821.

It can be written as a sum of positive squares in 4 ways, for example, as 112126921 + 16281225 = 10589^2 + 4035^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12180 + ... + 20128.

Almost surely, 2^128408146 is an apocalyptic number.

128408146 is a deficient number, since it is larger than the sum of its proper divisors (69928454).

128408146 is a wasteful number, since it uses less digits than its factorization.

128408146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8189.

The product of its (nonzero) digits is 12288, while the sum is 34.

The square root of 128408146 is about 11331.7318182174. The cubic root of 128408146 is about 504.5035096832.

The spelling of 128408146 in words is "one hundred twenty-eight million, four hundred eight thousand, one hundred forty-six".