648822 has 16 divisors (see below), whose sum is σ = 1374192. Its totient is φ = 203520.

The previous prime is 648803. The next prime is 648841. The reversal of 648822 is 228846.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (648803) and next prime (648841).

It is a self number, because there is not a number n which added to its sum of digits gives 648822.

It is a congruent number.

It is an unprimeable number.

648822 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 7 ways as a sum of consecutive naturals, for example, 3079 + ... + 3282.

It is an arithmetic number, because the mean of its divisors is an integer number (85887).

2⁶⁴⁸⁸²² is an apocalyptic number.

648822 is an abundant number, since it is smaller than the sum of its proper divisors (725370).

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

648822 is a wasteful number, since it uses less digits than its factorization.

648822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6383.

The product of its digits is 6144, while the sum is 30.

The square root of 648822 is about 805.4948789409. The cubic root of 648822 is about 86.5715491632.

It can be divided in two parts, 6 and 48822, that added together give a triangular number (48828 = T₃₁₂).

The spelling of 648822 in words is "six hundred forty-eight thousand, eight hundred twenty-two".