861719238 has 12 divisors (see below), whose sum is σ = 1867058388. Its totient is φ = 287239740.

The previous prime is 861719231. The next prime is 861719251. The reversal of 861719238 is 832917168.

861719238 is a `hidden beast` number, since 8 + 617 + 1 + 9 + 23 + 8 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 861719193 and 861719202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861719231) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23936628 + ... + 23936663.

It is an arithmetic number, because the mean of its divisors is an integer number (155588199).

Almost surely, 2^861719238 is an apocalyptic number.

861719238 is an abundant number, since it is smaller than the sum of its proper divisors (1005339150).

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

861719238 is a wasteful number, since it uses less digits than its factorization.

861719238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47873299 (or 47873296 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 861719238 is about 29355.0547265714. The cubic root of 861719238 is about 951.6018176560.

The spelling of 861719238 in words is "eight hundred sixty-one million, seven hundred nineteen thousand, two hundred thirty-eight".