872136885 has 16 divisors (see below), whose sum is σ = 1456089984. Its totient is φ = 444916032.

The previous prime is 872136883. The next prime is 872136887. The reversal of 872136885 is 588631278.

It is an interprime number because it is at equal distance from previous prime (872136883) and next prime (872136887).

It is not a de Polignac number, because 872136885 - 2¹ = 872136883 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (872136883) 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, 1263622 + ... + 1264311.

It is an arithmetic number, because the mean of its divisors is an integer number (91005624).

Almost surely, 2^872136885 is an apocalyptic number.

It is an amenable number.

872136885 is a deficient number, since it is larger than the sum of its proper divisors (583953099).

872136885 is a wasteful number, since it uses less digits than its factorization.

872136885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2527964.

The product of its digits is 645120, while the sum is 48.

The square root of 872136885 is about 29531.9637850245. The cubic root of 872136885 is about 955.4212244139.

The spelling of 872136885 in words is "eight hundred seventy-two million, one hundred thirty-six thousand, eight hundred eighty-five".