128980774 has 16 divisors (see below), whose sum is σ = 208541088. Its totient is φ = 59476032.

The previous prime is 128980771. The next prime is 128980811. The reversal of 128980774 is 477089821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128980771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53074 + ... + 55450.

It is an arithmetic number, because the mean of its divisors is an integer number (13033818).

Almost surely, 2^128980774 is an apocalyptic number.

128980774 is a deficient number, since it is larger than the sum of its proper divisors (79560314).

128980774 is a wasteful number, since it uses less digits than its factorization.

128980774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4479.

The product of its (nonzero) digits is 225792, while the sum is 46.

The square root of 128980774 is about 11356.9702826062. The cubic root of 128980774 is about 505.2523314996.

The spelling of 128980774 in words is "one hundred twenty-eight million, nine hundred eighty thousand, seven hundred seventy-four".