867856992 has 24 divisors (see below), whose sum is σ = 2278124856. Its totient is φ = 289285632.

The previous prime is 867856973. The next prime is 867856993. The reversal of 867856992 is 299658768.

It is a happy number.

867856992 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (867856993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4519993 + ... + 4520184.

It is an arithmetic number, because the mean of its divisors is an integer number (94921869).

Almost surely, 2^867856992 is an apocalyptic number.

It is an amenable number.

867856992 is an abundant number, since it is smaller than the sum of its proper divisors (1410267864).

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

867856992 is a wasteful number, since it uses less digits than its factorization.

867856992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9040190 (or 9040182 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 60.

The square root of 867856992 is about 29459.4126214356. The cubic root of 867856992 is about 953.8557943848.

The spelling of 867856992 in words is "eight hundred sixty-seven million, eight hundred fifty-six thousand, nine hundred ninety-two".