1808872 has 16 divisors (see below), whose sum is σ = 3652740. Its totient is φ = 834816.

The previous prime is 1808869. The next prime is 1808887. The reversal of 1808872 is 2788081.

It can be written as a sum of positive squares in 2 ways, for example, as 1602756 + 206116 = 1266^2 + 454^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8593 + ... + 8800.

2^1808872 is an apocalyptic number.

It is an amenable number.

1808872 is an abundant number, since it is smaller than the sum of its proper divisors (1843868).

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

1808872 is a wasteful number, since it uses less digits than its factorization.

1808872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17412 (or 17408 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 34.

The square root of 1808872 is about 1344.9431214739. The cubic root of 1808872 is about 121.8435691028.

The spelling of 1808872 in words is "one million, eight hundred eight thousand, eight hundred seventy-two".