1800650052 has 18 divisors (see below), whose sum is σ = 4551643278. Its totient is φ = 600216672.

The previous prime is 1800650051. The next prime is 1800650053. The reversal of 1800650052 is 2500560081.

1800650052 is a `hidden beast` number, since 1 + 8 + 0 + 0 + 650 + 0 + 5 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (1800650051) and next prime (1800650053).

It can be written as a sum of positive squares in only one way, i.e., 1693651716 + 106998336 = 41154^2 + 10344^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 1800649998 and 1800650025.

It is not an unprimeable number, because it can be changed into a prime (1800650051) 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, 25008993 + ... + 25009064.

It is an arithmetic number, because the mean of its divisors is an integer number (252869071).

Almost surely, 2^1800650052 is an apocalyptic number.

1800650052 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1800650052 is an abundant number, since it is smaller than the sum of its proper divisors (2750993226).

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

1800650052 is a wasteful number, since it uses less digits than its factorization.

1800650052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50018067 (or 50018062 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 1800650052 is about 42434.0671159388. The cubic root of 1800650052 is about 1216.5868165856.

The spelling of 1800650052 in words is "one billion, eight hundred million, six hundred fifty thousand, fifty-two".