862871028 has 12 divisors (see below), whose sum is σ = 2013365760. Its totient is φ = 287623672.

The previous prime is 862871003. The next prime is 862871063. The reversal of 862871028 is 820178268.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 35952948 + ... + 35952971.

It is an arithmetic number, because the mean of its divisors is an integer number (167780480).

Almost surely, 2^862871028 is an apocalyptic number.

It is an amenable number.

862871028 is an abundant number, since it is smaller than the sum of its proper divisors (1150494732).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

862871028 is a wasteful number, since it uses less digits than its factorization.

862871028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71905926 (or 71905924 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 42.

The square root of 862871028 is about 29374.6664321486. Note that the first 3 decimals coincide. The cubic root of 862871028 is about 952.0256051419.

The spelling of 862871028 in words is "eight hundred sixty-two million, eight hundred seventy-one thousand, twenty-eight".