1820632 has 32 divisors (see below), whose sum is σ = 3946320. Its totient is φ = 778240.

The previous prime is 1820629. The next prime is 1820633. The reversal of 1820632 is 2360281.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1820633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 888 + ... + 2104.

2^1820632 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 1820632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1973160).

1820632 is an abundant number, since it is smaller than the sum of its proper divisors (2125688).

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

1820632 is a wasteful number, since it uses less digits than its factorization.

1820632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1251 (or 1247 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 1820632 is about 1349.3079707761. The cubic root of 1820632 is about 122.1070457059.

The spelling of 1820632 in words is "one million, eight hundred twenty thousand, six hundred thirty-two".