861782070 has 32 divisors (see below), whose sum is σ = 2086588512. Its totient is φ = 227773952.

The previous prime is 861782057. The next prime is 861782081. The reversal of 861782070 is 70287168.

861782070 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123717 + ... + 130496.

It is an arithmetic number, because the mean of its divisors is an integer number (65205891).

Almost surely, 2^861782070 is an apocalyptic number.

861782070 is an abundant number, since it is smaller than the sum of its proper divisors (1224806442).

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

861782070 is a wasteful number, since it uses less digits than its factorization.

861782070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254336.

The product of its (nonzero) digits is 37632, while the sum is 39.

The square root of 861782070 is about 29356.1249145728. The cubic root of 861782070 is about 951.6249456810.

The spelling of 861782070 in words is "eight hundred sixty-one million, seven hundred eighty-two thousand, seventy".