128478578 has 8 divisors (see below), whose sum is σ = 197926572. Its totient is φ = 62503056.

The previous prime is 128478563. The next prime is 128478583. The reversal of 128478578 is 875874821.

It can be written as a sum of positive squares in 2 ways, for example, as 127531849 + 946729 = 11293^2 + 973^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 868025 + ... + 868172.

Almost surely, 2^128478578 is an apocalyptic number.

128478578 is a deficient number, since it is larger than the sum of its proper divisors (69447994).

128478578 is a wasteful number, since it uses less digits than its factorization.

128478578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1736236.

The product of its digits is 1003520, while the sum is 50.

The square root of 128478578 is about 11334.8391254574. The cubic root of 128478578 is about 504.5957330549.

The spelling of 128478578 in words is "one hundred twenty-eight million, four hundred seventy-eight thousand, five hundred seventy-eight".