128861084 has 24 divisors (see below), whose sum is σ = 252659568. Its totient is φ = 56989440.

The previous prime is 128861081. The next prime is 128861093. The reversal of 128861084 is 480168821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128861081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37949 + ... + 41204.

It is an arithmetic number, because the mean of its divisors is an integer number (10527482).

Almost surely, 2^128861084 is an apocalyptic number.

It is an amenable number.

128861084 is a deficient number, since it is larger than the sum of its proper divisors (123798484).

128861084 is a wasteful number, since it uses less digits than its factorization.

128861084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79205 (or 79203 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 38.

The square root of 128861084 is about 11351.6996084287. The cubic root of 128861084 is about 505.0959971737.

The spelling of 128861084 in words is "one hundred twenty-eight million, eight hundred sixty-one thousand, eighty-four".