128672877 has 8 divisors (see below), whose sum is σ = 171733120. Its totient is φ = 85697280.

The previous prime is 128672857. The next prime is 128672893. The reversal of 128672877 is 778276821.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 128672877 - 2⁷ = 128672749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128672827) 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, 17524 + ... + 23757.

It is an arithmetic number, because the mean of its divisors is an integer number (21466640).

Almost surely, 2^128672877 is an apocalyptic number.

It is an amenable number.

128672877 is a deficient number, since it is larger than the sum of its proper divisors (43060243).

128672877 is a wasteful number, since it uses less digits than its factorization.

128672877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42323.

The product of its digits is 526848, while the sum is 48.

The square root of 128672877 is about 11343.4067634023. The cubic root of 128672877 is about 504.8499727523.

The spelling of 128672877 in words is "one hundred twenty-eight million, six hundred seventy-two thousand, eight hundred seventy-seven".