861683280 has 40 divisors (see below), whose sum is σ = 2671218912. Its totient is φ = 229782144.

The previous prime is 861683279. The next prime is 861683299. The reversal of 861683280 is 82386168.

861683280 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 (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1794934 + ... + 1795413.

Almost surely, 2^861683280 is an apocalyptic number.

861683280 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

861683280 is an abundant number, since it is smaller than the sum of its proper divisors (1809535632).

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

861683280 is a wasteful number, since it uses less digits than its factorization.

861683280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3590363 (or 3590357 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 42.

The square root of 861683280 is about 29354.4422532604. The cubic root of 861683280 is about 951.5885812589.

The spelling of 861683280 in words is "eight hundred sixty-one million, six hundred eighty-three thousand, two hundred eighty".