864920 has 32 divisors (see below), whose sum is σ = 2224800. Its totient is φ = 296448.

The previous prime is 864917. The next prime is 864947. The reversal of 864920 is 29468.

864920 = T₆₄ + T₆₅ + ... + T₁₇₅.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1265 + ... + 1824.

It is an arithmetic number, because the mean of its divisors is an integer number (69525).

2⁸⁶⁴⁹²⁰ is an apocalyptic number.

It is an amenable number.

864920 is an abundant number, since it is smaller than the sum of its proper divisors (1359880).

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

864920 is a wasteful number, since it uses less digits than its factorization.

864920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3107 (or 3103 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 864920 is about 930.0107526260. The cubic root of 864920 is about 95.2778568894.

The spelling of 864920 in words is "eight hundred sixty-four thousand, nine hundred twenty".