1622844 has 36 divisors (see below), whose sum is σ = 4175080. Its totient is φ = 531360.

The previous prime is 1622839. The next prime is 1622849. The reversal of 1622844 is 4482261.

It is an interprime number because it is at equal distance from previous prime (1622839) and next prime (1622849).

It is a tau number, because it is divible by the number of its divisors (36).

It is a nialpdrome in base 6.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1622849) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1827 + ... + 2565.

2^1622844 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1622844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2087540).

1622844 is an abundant number, since it is smaller than the sum of its proper divisors (2552236).

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

1622844 is a wasteful number, since it uses less digits than its factorization.

1622844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810 (or 805 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

The square root of 1622844 is about 1273.9089449407. The cubic root of 1622844 is about 117.5147167322.

The spelling of 1622844 in words is "one million, six hundred twenty-two thousand, eight hundred forty-four".