864750 has 32 divisors (see below), whose sum is σ = 2160288. Its totient is φ = 230400.

The previous prime is 864737. The next prime is 864757. The reversal of 864750 is 57468.

It is a happy number.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864757) by changing a digit.

864750 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 174 + ... + 1326.

It is an arithmetic number, because the mean of its divisors is an integer number (67509).

2⁸⁶⁴⁷⁵⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 864750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1080144).

864750 is an abundant number, since it is smaller than the sum of its proper divisors (1295538).

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

864750 is a wasteful number, since it uses less digits than its factorization.

864750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1173 (or 1163 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 864750 is about 929.9193513418. The cubic root of 864750 is about 95.2716141937.

The spelling of 864750 in words is "eight hundred sixty-four thousand, seven hundred fifty".