128845388 has 12 divisors (see below), whose sum is σ = 257690832. Its totient is φ = 55219440.

The previous prime is 128845373. The next prime is 128845399. The reversal of 128845388 is 883548821.

128845388 is an admirable number.

It is a super-2 number, since 2×128845388² = 33202268017741088, which contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2300783 + ... + 2300838.

It is an arithmetic number, because the mean of its divisors is an integer number (21474236).

Almost surely, 2^128845388 is an apocalyptic number.

It is an amenable number.

128845388 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128845388 is a wasteful number, since it uses less digits than its factorization.

128845388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4601632 (or 4601630 counting only the distinct ones).

The product of its digits is 491520, while the sum is 47.

The square root of 128845388 is about 11351.0082371567. The cubic root of 128845388 is about 505.0754885029.

The spelling of 128845388 in words is "one hundred twenty-eight million, eight hundred forty-five thousand, three hundred eighty-eight".