402822 has 48 divisors (see below), whose sum is σ = 1048320. Its totient is φ = 109296.

The previous prime is 402817. The next prime is 402823. The reversal of 402822 is 228204.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 402795 and 402804.

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 402822.

It is not an unprimeable number, because it can be changed into a prime (402823) by changing a digit.

402822 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 23 ways as a sum of consecutive naturals, for example, 2829 + ... + 2967.

It is an arithmetic number, because the mean of its divisors is an integer number (21840).

2⁴⁰²⁸²² is an apocalyptic number.

402822 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 402822, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (524160).

402822 is an abundant number, since it is smaller than the sum of its proper divisors (645498).

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

402822 is a wasteful number, since it uses less digits than its factorization.

402822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177 (or 174 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 402822 is about 634.6825978393. The cubic root of 402822 is about 73.8534963653.

The spelling of 402822 in words is "four hundred two thousand, eight hundred twenty-two".