1820610 has 64 divisors (see below), whose sum is σ = 5304960. Its totient is φ = 440640.

The previous prime is 1820597. The next prime is 1820617. The reversal of 1820610 is 160281.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1820617) 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, 2664 + ... + 3276.

It is an arithmetic number, because the mean of its divisors is an integer number (82890).

2^1820610 is an apocalyptic number.

1820610 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1820610, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2652480).

1820610 is an abundant number, since it is smaller than the sum of its proper divisors (3484350).

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

1820610 is a wasteful number, since it uses less digits than its factorization.

1820610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640 (or 634 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 1820610 is about 1349.2998184244. The cubic root of 1820610 is about 122.1065538683.

Adding to 1820610 its reverse (160281), we get a palindrome (1980891).

The spelling of 1820610 in words is "one million, eight hundred twenty thousand, six hundred ten".