1808379090 has 48 divisors (see below), whose sum is σ = 5373471168. Its totient is φ = 413343648.

The previous prime is 1808379077. The next prime is 1808379091. The reversal of 1808379090 is 909738081.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (1808379091) 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 23 ways as a sum of consecutive naturals, for example, 1434592 + ... + 1435851.

It is an arithmetic number, because the mean of its divisors is an integer number (111947316).

Almost surely, 2^1808379090 is an apocalyptic number.

1808379090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1808379090 is an abundant number, since it is smaller than the sum of its proper divisors (3565092078).

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

1808379090 is a wasteful number, since it uses less digits than its factorization.

1808379090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2870463 (or 2870460 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 1808379090 is about 42525.0407407212. The cubic root of 1808379090 is about 1218.3250081097.

The spelling of 1808379090 in words is "one billion, eight hundred eight million, three hundred seventy-nine thousand, ninety".