1812025090 has 8 divisors (see below), whose sum is σ = 3261645180. Its totient is φ = 724810032.

The previous prime is 1812025081. The next prime is 1812025091. The reversal of 1812025090 is 905202181.

It can be written as a sum of positive squares in 2 ways, for example, as 1807355169 + 4669921 = 42513^2 + 2161^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1812025091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90601245 + ... + 90601264.

Almost surely, 2^1812025090 is an apocalyptic number.

1812025090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1812025090 is a deficient number, since it is larger than the sum of its proper divisors (1449620090).

1812025090 is a wasteful number, since it uses less digits than its factorization.

1812025090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181202516.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 1812025090 is about 42567.8880143237. Note that the first 3 decimals coincide. The cubic root of 1812025090 is about 1219.1432419742.

The spelling of 1812025090 in words is "one billion, eight hundred twelve million, twenty-five thousand, ninety".