1820862 has 12 divisors (see below), whose sum is σ = 3945240. Its totient is φ = 606948.

The previous prime is 1820857. The next prime is 1820869. The reversal of 1820862 is 2680281.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1820869) 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 5 ways as a sum of consecutive naturals, for example, 50562 + ... + 50597.

It is an arithmetic number, because the mean of its divisors is an integer number (328770).

2^1820862 is an apocalyptic number.

1820862 is an abundant number, since it is smaller than the sum of its proper divisors (2124378).

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

1820862 is a wasteful number, since it uses less digits than its factorization.

1820862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101167 (or 101164 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 1820862 is about 1349.3931969593. The cubic root of 1820862 is about 122.1121874072.

The spelling of 1820862 in words is "one million, eight hundred twenty thousand, eight hundred sixty-two".