872128755 has 16 divisors (see below), whose sum is σ = 1550451360. Its totient is φ = 465135264.

The previous prime is 872128721. The next prime is 872128759. The reversal of 872128755 is 557821278.

It is not a de Polignac number, because 872128755 - 2¹³ = 872120563 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 872128755.

It is not an unprimeable number, because it can be changed into a prime (872128759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3229972 + ... + 3230241.

It is an arithmetic number, because the mean of its divisors is an integer number (96903210).

Almost surely, 2^872128755 is an apocalyptic number.

872128755 is a deficient number, since it is larger than the sum of its proper divisors (678322605).

872128755 is a wasteful number, since it uses less digits than its factorization.

872128755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6460227 (or 6460221 counting only the distinct ones).

The product of its digits is 313600, while the sum is 45.

The square root of 872128755 is about 29531.8261372371. The cubic root of 872128755 is about 955.4182556144.

The spelling of 872128755 in words is "eight hundred seventy-two million, one hundred twenty-eight thousand, seven hundred fifty-five".