1805470812 has 18 divisors (see below), whose sum is σ = 4563829088. Its totient is φ = 601823592.

The previous prime is 1805470781. The next prime is 1805470817. The reversal of 1805470812 is 2180745081.

1805470812 is a `hidden beast` number, since 180 + 5 + 470 + 8 + 1 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 50151967 = 1805470812 / (1 + 8 + 0 + 5 + 4 + 7 + 0 + 8 + 1 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1805470817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25075948 + ... + 25076019.

Almost surely, 2^1805470812 is an apocalyptic number.

1805470812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1805470812 is an abundant number, since it is smaller than the sum of its proper divisors (2758358276).

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

1805470812 is a wasteful number, since it uses less digits than its factorization.

1805470812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50151977 (or 50151972 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 36.

The square root of 1805470812 is about 42490.8320935234. The cubic root of 1805470812 is about 1217.6715446534.

The spelling of 1805470812 in words is "one billion, eight hundred five million, four hundred seventy thousand, eight hundred twelve".