863789140 has 24 divisors (see below), whose sum is σ = 1815619680. Its totient is φ = 345199008.

The previous prime is 863789137. The next prime is 863789149. The reversal of 863789140 is 41987368.

It is a happy number.

It is a super-2 number, since 2×863789140² = 1492263356763879200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (863789149) 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, 3231 + ... + 41689.

It is an arithmetic number, because the mean of its divisors is an integer number (75650820).

Almost surely, 2^863789140 is an apocalyptic number.

It is an amenable number.

863789140 is an abundant number, since it is smaller than the sum of its proper divisors (951830540).

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

863789140 is a wasteful number, since it uses less digits than its factorization.

863789140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39591 (or 39589 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 46.

The square root of 863789140 is about 29390.2898930922. The cubic root of 863789140 is about 952.3631435376.

The spelling of 863789140 in words is "eight hundred sixty-three million, seven hundred eighty-nine thousand, one hundred forty".