128820874 has 32 divisors (see below), whose sum is σ = 250346880. Its totient is φ = 48278592.

The previous prime is 128820869. The next prime is 128820877. The reversal of 128820874 is 478028821.

It is not an unprimeable number, because it can be changed into a prime (128820877) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15169 + ... + 22084.

It is an arithmetic number, because the mean of its divisors is an integer number (7823340).

Almost surely, 2^128820874 is an apocalyptic number.

128820874 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

128820874 is a deficient number, since it is larger than the sum of its proper divisors (121526006).

128820874 is a wasteful number, since it uses less digits than its factorization.

128820874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37294.

The product of its (nonzero) digits is 57344, while the sum is 40.

The square root of 128820874 is about 11349.9283698180. The cubic root of 128820874 is about 505.0434547451.

The spelling of 128820874 in words is "one hundred twenty-eight million, eight hundred twenty thousand, eight hundred seventy-four".