128980826 has 16 divisors (see below), whose sum is σ = 217413504. Its totient is φ = 56941104.

The previous prime is 128980811. The next prime is 128980837. The reversal of 128980826 is 628089821.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107246 + ... + 108441.

It is an arithmetic number, because the mean of its divisors is an integer number (13588344).

Almost surely, 2^128980826 is an apocalyptic number.

128980826 is a deficient number, since it is larger than the sum of its proper divisors (88432678).

128980826 is a wasteful number, since it uses less digits than its factorization.

128980826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215725.

The product of its (nonzero) digits is 110592, while the sum is 44.

The square root of 128980826 is about 11356.9725719489. The cubic root of 128980826 is about 505.2523993990.

The spelling of 128980826 in words is "one hundred twenty-eight million, nine hundred eighty thousand, eight hundred twenty-six".