863061840 has 120 divisors (see below), whose sum is σ = 2941874208. Its totient is φ = 226702080.

The previous prime is 863061827. The next prime is 863061847. The reversal of 863061840 is 48160368.

It is a happy number.

863061840 is a `hidden beast` number, since 8 + 6 + 30 + 618 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 863061795 and 863061804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (863061847) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39295 + ... + 57185.

Almost surely, 2^863061840 is an apocalyptic number.

863061840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 863061840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1470937104).

863061840 is an abundant number, since it is smaller than the sum of its proper divisors (2078812368).

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

863061840 is a wasteful number, since it uses less digits than its factorization.

863061840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17977 (or 17968 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 863061840 is about 29377.9141533227. The cubic root of 863061840 is about 952.0957757372.

The spelling of 863061840 in words is "eight hundred sixty-three million, sixty-one thousand, eight hundred forty".