128829388 has 12 divisors (see below), whose sum is σ = 225552600. Its totient is φ = 64385792.

The previous prime is 128829361. The next prime is 128829401. The reversal of 128829388 is 883928821.

It is a super-2 number, since 2×128829388² = 33194022424909088, which contains 22 as substring.

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 in 3 ways as a sum of consecutive naturals, for example, 5163 + ... + 16861.

It is an arithmetic number, because the mean of its divisors is an integer number (18796050).

Almost surely, 2^128829388 is an apocalyptic number.

It is an amenable number.

128829388 is a deficient number, since it is larger than the sum of its proper divisors (96723212).

128829388 is a wasteful number, since it uses less digits than its factorization.

128829388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14456 (or 14454 counting only the distinct ones).

The product of its digits is 442368, while the sum is 49.

The square root of 128829388 is about 11350.3034320674. The cubic root of 128829388 is about 505.0545809058.

The spelling of 128829388 in words is "one hundred twenty-eight million, eight hundred twenty-nine thousand, three hundred eighty-eight".