1820672 has 48 divisors (see below), whose sum is σ = 4193280. Its totient is φ = 774144.

The previous prime is 1820671. The next prime is 1820677. The reversal of 1820672 is 2760281.

It is not an unprimeable number, because it can be changed into a prime (1820671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14273 + ... + 14399.

It is an arithmetic number, because the mean of its divisors is an integer number (87360).

2^1820672 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 1820672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2096640).

1820672 is an abundant number, since it is smaller than the sum of its proper divisors (2372608).

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

1820672 is an equidigital number, since it uses as much as digits as its factorization.

1820672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156 (or 136 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 1820672 is about 1349.3227931077. The cubic root of 1820672 is about 122.1079399459.

The spelling of 1820672 in words is "one million, eight hundred twenty thousand, six hundred seventy-two".