1812908049 has 8 divisors (see below), whose sum is σ = 2417452320. Its totient is φ = 1208484576.

The previous prime is 1812908039. The next prime is 1812908057. The reversal of 1812908049 is 9408092181.

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

It is not a de Polignac number, because 1812908049 - 2⁸ = 1812907793 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1812908049.

It is not an unprimeable number, because it can be changed into a prime (1812908039) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14109 + ... + 61845.

It is an arithmetic number, because the mean of its divisors is an integer number (302181540).

Almost surely, 2^1812908049 is an apocalyptic number.

It is an amenable number.

1812908049 is a deficient number, since it is larger than the sum of its proper divisors (604544271).

1812908049 is a wasteful number, since it uses less digits than its factorization.

1812908049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60399.

The product of its (nonzero) digits is 41472, while the sum is 42.

The square root of 1812908049 is about 42578.2579375906. The cubic root of 1812908049 is about 1219.3412301638.

The spelling of 1812908049 in words is "one billion, eight hundred twelve million, nine hundred eight thousand, forty-nine".