1808045340 has 48 divisors (see below), whose sum is σ = 5109858432. Its totient is φ = 477637696.

The previous prime is 1808045329. The next prime is 1808045359. The reversal of 1808045340 is 435408081.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134394 + ... + 147233.

It is an arithmetic number, because the mean of its divisors is an integer number (106455384).

Almost surely, 2^1808045340 is an apocalyptic number.

1808045340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1808045340 is an abundant number, since it is smaller than the sum of its proper divisors (3301813092).

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

1808045340 is a wasteful number, since it uses less digits than its factorization.

1808045340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281746 (or 281744 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 1808045340 is about 42521.1164011483. The cubic root of 1808045340 is about 1218.2500531420.

The spelling of 1808045340 in words is "one billion, eight hundred eight million, forty-five thousand, three hundred forty".