128877876 has 36 divisors (see below), whose sum is σ = 326378052. Its totient is φ = 42879744.

The previous prime is 128877869. The next prime is 128877887. The reversal of 128877876 is 678778821.

It can be written as a sum of positive squares in 2 ways, for example, as 50979600 + 77898276 = 7140^2 + 8826^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18330 + ... + 24366.

It is an arithmetic number, because the mean of its divisors is an integer number (9066057).

Almost surely, 2^128877876 is an apocalyptic number.

It is an amenable number.

128877876 is an abundant number, since it is smaller than the sum of its proper divisors (197500176).

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

128877876 is a wasteful number, since it uses less digits than its factorization.

128877876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6640 (or 6635 counting only the distinct ones).

The product of its digits is 2107392, while the sum is 54.

The square root of 128877876 is about 11352.4392092625. The cubic root of 128877876 is about 505.1179360538.

The spelling of 128877876 in words is "one hundred twenty-eight million, eight hundred seventy-seven thousand, eight hundred seventy-six".