867120885 has 12 divisors (see below), whose sum is σ = 1503009612. Its totient is φ = 462464448.

The previous prime is 867120869. The next prime is 867120889. The reversal of 867120885 is 588021768.

It can be written as a sum of positive squares in 2 ways, for example, as 542796804 + 324324081 = 23298^2 + 18009^2 .

It is not a de Polignac number, because 867120885 - 2⁴ = 867120869 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 19269353 = 867120885 / (8 + 6 + 7 + 1 + 2 + 0 + 8 + 8 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 867120885.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (867120889) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9634632 + ... + 9634721.

It is an arithmetic number, because the mean of its divisors is an integer number (125250801).

Almost surely, 2^867120885 is an apocalyptic number.

It is an amenable number.

867120885 is a deficient number, since it is larger than the sum of its proper divisors (635888727).

867120885 is a wasteful number, since it uses less digits than its factorization.

867120885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19269364 (or 19269361 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 45.

The square root of 867120885 is about 29446.9163920435. The cubic root of 867120885 is about 953.5860346805.

The spelling of 867120885 in words is "eight hundred sixty-seven million, one hundred twenty thousand, eight hundred eighty-five".