860778 has 48 divisors (see below), whose sum is σ = 2063880. Its totient is φ = 258048.

The previous prime is 860759. The next prime is 860779. The reversal of 860778 is 877068.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 804609 + 56169 = 897^2 + 237^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (860779) 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, 8826 + ... + 8922.

2⁸⁶⁰⁷⁷⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 860778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1031940).

860778 is an abundant number, since it is smaller than the sum of its proper divisors (1203102).

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

860778 is a wasteful number, since it uses less digits than its factorization.

860778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151 (or 148 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 860778 is about 927.7812242118. The cubic root of 860778 is about 95.1255219807.

Subtracting 860778 from its reverse (877068), we obtain a triangular number (16290 = T₁₈₀).

The spelling of 860778 in words is "eight hundred sixty thousand, seven hundred seventy-eight".