180863840 has 48 divisors (see below), whose sum is σ = 430602480. Its totient is φ = 71784960.

The previous prime is 180863803. The next prime is 180863873. The reversal of 180863840 is 48368081.

It is a junction number, because it is equal to n+sod(n) for n = 180863794 and 180863803.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16646 + ... + 25274.

It is an arithmetic number, because the mean of its divisors is an integer number (8970885).

Almost surely, 2^180863840 is an apocalyptic number.

180863840 is a gapful number since it is divisible by the number (10) 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 180863840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215301240).

180863840 is an abundant number, since it is smaller than the sum of its proper divisors (249738640).

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

180863840 is a wasteful number, since it uses less digits than its factorization.

180863840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8775 (or 8767 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 38.

The square root of 180863840 is about 13448.5627484873. The cubic root of 180863840 is about 565.5234035651.

The spelling of 180863840 in words is "one hundred eighty million, eight hundred sixty-three thousand, eight hundred forty".