128278004 has 6 divisors (see below), whose sum is σ = 224486514. Its totient is φ = 64139000.

The previous prime is 128277983. The next prime is 128278019. The reversal of 128278004 is 400872821.

It can be written as a sum of positive squares in only one way, i.e., 80640400 + 47637604 = 8980^2 + 6902^2 .

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 as a sum of consecutive naturals, namely, 16034747 + ... + 16034754.

It is an arithmetic number, because the mean of its divisors is an integer number (37414419).

Almost surely, 2^128278004 is an apocalyptic number.

It is an amenable number.

128278004 is a deficient number, since it is larger than the sum of its proper divisors (96208510).

128278004 is a wasteful number, since it uses less digits than its factorization.

128278004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32069505 (or 32069503 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 128278004 is about 11325.9879922239. The cubic root of 128278004 is about 504.3330135179. Note that the first 3 decimals are identical.

The spelling of 128278004 in words is "one hundred twenty-eight million, two hundred seventy-eight thousand, four".