128978176 has 18 divisors (see below), whose sum is σ = 257453042. Its totient is φ = 64488960.

The previous prime is 128978173. The next prime is 128978207. The reversal of 128978176 is 671879821.

It can be written as a sum of positive squares in only one way, i.e., 120121600 + 8856576 = 10960^2 + 2976^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128978173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 251655 + ... + 252166.

Almost surely, 2^128978176 is an apocalyptic number.

128978176 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

128978176 is a deficient number, since it is larger than the sum of its proper divisors (128474866).

128978176 is an frugal number, since it uses more digits than its factorization.

128978176 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503837 (or 503823 counting only the distinct ones).

The product of its digits is 338688, while the sum is 49.

The square root of 128978176 is about 11356.8559029337. The cubic root of 128978176 is about 505.2489391223.

The spelling of 128978176 in words is "one hundred twenty-eight million, nine hundred seventy-eight thousand, one hundred seventy-six".