860385240 has 384 divisors, whose sum is σ = 3412281600. Its totient is φ = 192222720.

The previous prime is 860385203. The next prime is 860385241. The reversal of 860385240 is 42583068.

860385240 is a `hidden beast` number, since 8 + 603 + 8 + 5 + 2 + 40 = 666.

It is a super-2 number, since 2×860385240² = 1480525522419715200, which contains 22 as substring.

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 = 860385195 and 860385204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (860385241) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1389651 + ... + 1390269.

It is an arithmetic number, because the mean of its divisors is an integer number (8886150).

Almost surely, 2^860385240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 860385240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1706140800).

860385240 is an abundant number, since it is smaller than the sum of its proper divisors (2551896360).

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

860385240 is a wasteful number, since it uses less digits than its factorization.

860385240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669 (or 653 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 860385240 is about 29332.3241493067. The cubic root of 860385240 is about 951.1105166669.

The spelling of 860385240 in words is "eight hundred sixty million, three hundred eighty-five thousand, two hundred forty".