1808328249 has 96 divisors (see below), whose sum is σ = 3429171200. Its totient is φ = 891596160.

The previous prime is 1808328163. The next prime is 1808328283. The reversal of 1808328249 is 9428238081.

1808328249 is a `hidden beast` number, since 1 + 80 + 8 + 328 + 249 = 666.

It is not a de Polignac number, because 1808328249 - 2¹⁵ = 1808295481 is a prime.

It is a super-2 number, since 2×1808328249² = 6540102112262812002, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1808328289) 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 95 ways as a sum of consecutive naturals, for example, 1228584 + ... + 1230054.

Almost surely, 2^1808328249 is an apocalyptic number.

1808328249 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1808328249 is a deficient number, since it is larger than the sum of its proper divisors (1620842951).

1808328249 is a wasteful number, since it uses less digits than its factorization.

1808328249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1595 (or 1592 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The square root of 1808328249 is about 42524.4429593146. The cubic root of 1808328249 is about 1218.3135906212.

The spelling of 1808328249 in words is "one billion, eight hundred eight million, three hundred twenty-eight thousand, two hundred forty-nine".