860257840 has 80 divisors (see below), whose sum is σ = 2194734528. Its totient is φ = 311620608.

The previous prime is 860257831. The next prime is 860257877. The reversal of 860257840 is 48752068.

860257840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 860257793 and 860257802.

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, 47317 + ... + 62923.

Almost surely, 2^860257840 is an apocalyptic number.

860257840 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 860257840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1097367264).

860257840 is an abundant number, since it is smaller than the sum of its proper divisors (1334476688).

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

860257840 is a wasteful number, since it uses less digits than its factorization.

860257840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15686 (or 15680 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 40.

The square root of 860257840 is about 29330.1524032863. The cubic root of 860257840 is about 951.0635696888.

The spelling of 860257840 in words is "eight hundred sixty million, two hundred fifty-seven thousand, eight hundred forty".