1805208828 has 24 divisors (see below), whose sum is σ = 4212948432. Its totient is φ = 601622784.

The previous prime is 1805208773. The next prime is 1805208851. The reversal of 1805208828 is 8288025081.

It is a self number, because there is not a number n which added to its sum of digits gives 1805208828.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74026 + ... + 95342.

It is an arithmetic number, because the mean of its divisors is an integer number (175539518).

Almost surely, 2^1805208828 is an apocalyptic number.

It is an amenable number.

1805208828 is an abundant number, since it is smaller than the sum of its proper divisors (2407739604).

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

1805208828 is a wasteful number, since it uses less digits than its factorization.

1805208828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28381 (or 28379 counting only the distinct ones).

The product of its (nonzero) digits is 81920, while the sum is 42.

The square root of 1805208828 is about 42487.7491519614. The cubic root of 1805208828 is about 1217.6126448010.

The spelling of 1805208828 in words is "one billion, eight hundred five million, two hundred eight thousand, eight hundred twenty-eight".