128878008 has 32 divisors (see below), whose sum is σ = 368223360. Its totient is φ = 36822240.

The previous prime is 128877989. The next prime is 128878027. The reversal of 128878008 is 800878821.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (128877989) and next prime (128878027).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

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, 383398 + ... + 383733.

It is an arithmetic number, because the mean of its divisors is an integer number (11506980).

Almost surely, 2^128878008 is an apocalyptic number.

It is an amenable number.

128878008 is an abundant number, since it is smaller than the sum of its proper divisors (239345352).

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

128878008 is a wasteful number, since it uses less digits than its factorization.

128878008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 767147 (or 767143 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 42.

The square root of 128878008 is about 11352.4450229895. The cubic root of 128878008 is about 505.1181085053.

The spelling of 128878008 in words is "one hundred twenty-eight million, eight hundred seventy-eight thousand, eight".