128408474 has 16 divisors (see below), whose sum is σ = 197648640. Its totient is φ = 62531040.

The previous prime is 128408461. The next prime is 128408507. The reversal of 128408474 is 474804821.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69527 + ... + 71349.

It is an arithmetic number, because the mean of its divisors is an integer number (12353040).

Almost surely, 2^128408474 is an apocalyptic number.

128408474 is a deficient number, since it is larger than the sum of its proper divisors (69240166).

128408474 is a wasteful number, since it uses less digits than its factorization.

128408474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2725.

The product of its (nonzero) digits is 57344, while the sum is 38.

The square root of 128408474 is about 11331.7462908415. The cubic root of 128408474 is about 504.5039392432.

The spelling of 128408474 in words is "one hundred twenty-eight million, four hundred eight thousand, four hundred seventy-four".