864807 has 16 divisors (see below), whose sum is σ = 1262592. Its totient is φ = 524160.

The previous prime is 864803. The next prime is 864811. The reversal of 864807 is 708468.

864807 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (864803) and next prime (864811).

It is not a de Polignac number, because 864807 - 2² = 864803 is a prime.

It is a super-2 number, since 2×864807² = 1495782294498, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1308 + ... + 1854.

It is an arithmetic number, because the mean of its divisors is an integer number (78912).

2⁸⁶⁴⁸⁰⁷ is an apocalyptic number.

864807 is a deficient number, since it is larger than the sum of its proper divisors (397785).

864807 is a wasteful number, since it uses less digits than its factorization.

864807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598.

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 864807 is about 929.9499986558. The cubic root of 864807 is about 95.2737074240.

The spelling of 864807 in words is "eight hundred sixty-four thousand, eight hundred seven".