1622820 has 96 divisors (see below), whose sum is σ = 5056128. Its totient is φ = 387072.

The previous prime is 1622813. The next prime is 1622827. The reversal of 1622820 is 282261.

It is an interprime number because it is at equal distance from previous prime (1622813) and next prime (1622827).

It is not an unprimeable number, because it can be changed into a prime (1622827) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37719 + ... + 37761.

It is an arithmetic number, because the mean of its divisors is an integer number (52668).

2^1622820 is an apocalyptic number.

1622820 is a gapful number since it is divisible by the number (10) 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 1622820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2528064).

1622820 is an abundant number, since it is smaller than the sum of its proper divisors (3433308).

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

1622820 is a wasteful number, since it uses less digits than its factorization.

1622820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109 (or 107 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 1622820 is about 1273.8995250804. The cubic root of 1622820 is about 117.5141374267.

It can be divided in two parts, 1622 and 820, that added together give a palindrome (2442).

The spelling of 1622820 in words is "one million, six hundred twenty-two thousand, eight hundred twenty".