1808972 has 12 divisors (see below), whose sum is σ = 3453576. Its totient is φ = 822240.

The previous prime is 1808969. The next prime is 1808977. The reversal of 1808972 is 2798081.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1808977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20513 + ... + 20600.

It is an arithmetic number, because the mean of its divisors is an integer number (287798).

2^1808972 is an apocalyptic number.

It is an amenable number.

1808972 is a deficient number, since it is larger than the sum of its proper divisors (1644604).

1808972 is a wasteful number, since it uses less digits than its factorization.

1808972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41128 (or 41126 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 35.

The square root of 1808972 is about 1344.9802972535. The cubic root of 1808972 is about 121.8458143570.

The spelling of 1808972 in words is "one million, eight hundred eight thousand, nine hundred seventy-two".