863823540 has 48 divisors (see below), whose sum is σ = 2427300288. Its totient is φ = 229534464.

The previous prime is 863823539. The next prime is 863823593. The reversal of 863823540 is 45328368.

It is a super-3 number, since 3×863823540³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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, 8457 + ... + 42416.

It is an arithmetic number, because the mean of its divisors is an integer number (50568756).

Almost surely, 2^863823540 is an apocalyptic number.

It is an amenable number.

863823540 is an abundant number, since it is smaller than the sum of its proper divisors (1563476748).

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

863823540 is a wasteful number, since it uses less digits than its factorization.

863823540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51168 (or 51166 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 39.

The square root of 863823540 is about 29390.8751145657. The cubic root of 863823540 is about 952.3757858426.

The spelling of 863823540 in words is "eight hundred sixty-three million, eight hundred twenty-three thousand, five hundred forty".