1805200452 has 72 divisors (see below), whose sum is σ = 5144333600. Its totient is φ = 547026480.

The previous prime is 1805200391. The next prime is 1805200457. The reversal of 1805200452 is 2540025081.

It is a happy number.

1805200452 is a `hidden beast` number, since 1 + 8 + 0 + 5 + 200 + 452 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1805200457) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56002 + ... + 82137.

Almost surely, 2^1805200452 is an apocalyptic number.

1805200452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1805200452 is an abundant number, since it is smaller than the sum of its proper divisors (3339133148).

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

1805200452 is a wasteful number, since it uses less digits than its factorization.

1805200452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138174 (or 138155 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 1805200452 is about 42487.6505822574. The cubic root of 1805200452 is about 1217.6107615952.

The spelling of 1805200452 in words is "one billion, eight hundred five million, two hundred thousand, four hundred fifty-two".