861693712 has 40 divisors (see below), whose sum is σ = 1900503360. Its totient is φ = 374647680.

The previous prime is 861693709. The next prime is 861693713. The reversal of 861693712 is 217396168.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (861693713) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102387 + ... + 110482.

It is an arithmetic number, because the mean of its divisors is an integer number (47512584).

Almost surely, 2^861693712 is an apocalyptic number.

It is an amenable number.

861693712 is an abundant number, since it is smaller than the sum of its proper divisors (1038809648).

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

861693712 is a wasteful number, since it uses less digits than its factorization.

861693712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212911 (or 212905 counting only the distinct ones).

The product of its digits is 108864, while the sum is 43.

The square root of 861693712 is about 29354.6199430345. The cubic root of 861693712 is about 951.5924213906.

The spelling of 861693712 in words is "eight hundred sixty-one million, six hundred ninety-three thousand, seven hundred twelve".