128345408 has 14 divisors (see below), whose sum is σ = 254685546. Its totient is φ = 64172672.

The previous prime is 128345381. The next prime is 128345417. The reversal of 128345408 is 804543821.

It can be written as a sum of positive squares in only one way, i.e., 126517504 + 1827904 = 11248^2 + 1352^2 .

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, 1002635 + ... + 1002762.

Almost surely, 2^128345408 is an apocalyptic number.

It is an amenable number.

128345408 is a deficient number, since it is larger than the sum of its proper divisors (126340138).

128345408 is an equidigital number, since it uses as much as digits as its factorization.

128345408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2005409 (or 2005399 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 35.

The square root of 128345408 is about 11328.9632358835. The cubic root of 128345408 is about 504.4213324009.

The spelling of 128345408 in words is "one hundred twenty-eight million, three hundred forty-five thousand, four hundred eight".