868723680 has 96 divisors (see below), whose sum is σ = 2985268608. Its totient is φ = 210598400.

The previous prime is 868723679. The next prime is 868723717. The reversal of 868723680 is 86327868.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76986 + ... + 87545.

It is an arithmetic number, because the mean of its divisors is an integer number (31096548).

Almost surely, 2^868723680 is an apocalyptic number.

868723680 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

868723680 is an abundant number, since it is smaller than the sum of its proper divisors (2116544928).

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

868723680 is a wasteful number, since it uses less digits than its factorization.

868723680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164560 (or 164552 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 48.

The square root of 868723680 is about 29474.1188163446. The cubic root of 868723680 is about 954.1732123991.

The spelling of 868723680 in words is "eight hundred sixty-eight million, seven hundred twenty-three thousand, six hundred eighty".