128408476 has 12 divisors (see below), whose sum is σ = 256817008. Its totient is φ = 55032192.

The previous prime is 128408461. The next prime is 128408507. The reversal of 128408476 is 674804821.

128408476 is an admirable number.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 2292981 + ... + 2293036.

Almost surely, 2^128408476 is an apocalyptic number.

It is an amenable number.

128408476 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

128408476 is a wasteful number, since it uses less digits than its factorization.

128408476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4586028 (or 4586026 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 40.

The square root of 128408476 is about 11331.7463790891. The cubic root of 128408476 is about 504.5039418625.

It can be divided in two parts, 12840 and 8476, that added together give a square (21316 = 146²).

The spelling of 128408476 in words is "one hundred twenty-eight million, four hundred eight thousand, four hundred seventy-six".