1822428 has 72 divisors (see below), whose sum is σ = 5031936. Its totient is φ = 554400.

The previous prime is 1822427. The next prime is 1822439. The reversal of 1822428 is 8242281.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1822427) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25633 + ... + 25703.

It is an arithmetic number, because the mean of its divisors is an integer number (69888).

2^1822428 is an apocalyptic number.

1822428 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1822428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2515968).

1822428 is an abundant number, since it is smaller than the sum of its proper divisors (3209508).

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

1822428 is a wasteful number, since it uses less digits than its factorization.

1822428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135 (or 130 counting only the distinct ones).

The product of its digits is 2048, while the sum is 27.

The square root of 1822428 is about 1349.9733330700. The cubic root of 1822428 is about 122.1471841818.

The spelling of 1822428 in words is "one million, eight hundred twenty-two thousand, four hundred twenty-eight".