864270 has 80 divisors (see below), whose sum is σ = 2561328. Its totient is φ = 207360.

The previous prime is 864251. The next prime is 864277. The reversal of 864270 is 72468.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864277) by changing a digit.

864270 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 39 ways as a sum of consecutive naturals, for example, 8862 + ... + 8958.

2⁸⁶⁴²⁷⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 864270, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1280664).

864270 is an abundant number, since it is smaller than the sum of its proper divisors (1697058).

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

864270 is a wasteful number, since it uses less digits than its factorization.

864270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127 (or 118 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 864270 is about 929.6612286204. The cubic root of 864270 is about 95.2539833414.

It can be divided in two parts, 86 and 4270, that added together give a square (4356 = 66²).

The spelling of 864270 in words is "eight hundred sixty-four thousand, two hundred seventy".