863420 has 24 divisors (see below), whose sum is σ = 1893024. Its totient is φ = 330176.

The previous prime is 863393. The next prime is 863479. The reversal of 863420 is 24368.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 863420.

It is an unprimeable number.

863420 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 479 + ... + 1398.

It is an arithmetic number, because the mean of its divisors is an integer number (78876).

2⁸⁶³⁴²⁰ is an apocalyptic number.

It is an amenable number.

863420 is an abundant number, since it is smaller than the sum of its proper divisors (1029604).

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

863420 is a wasteful number, since it uses less digits than its factorization.

863420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1909 (or 1907 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 863420 is about 929.2039603876. The cubic root of 863420 is about 95.2227460184. Note that the first 3 decimals are identical.

Subtracting from 863420 its product of nonzero digits (1152), we obtain a palindrome (862268).

Adding to 863420 its reverse (24368), we get a palindrome (887788).

The spelling of 863420 in words is "eight hundred sixty-three thousand, four hundred twenty".