1808923252 has 12 divisors (see below), whose sum is σ = 3168369316. Its totient is φ = 903674880.

The previous prime is 1808923247. The next prime is 1808923327. The reversal of 1808923252 is 2523298081.

It can be written as a sum of positive squares in 2 ways, for example, as 663371536 + 1145551716 = 25756^2 + 33846^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191499 + ... + 200722.

Almost surely, 2^1808923252 is an apocalyptic number.

It is an amenable number.

1808923252 is a deficient number, since it is larger than the sum of its proper divisors (1359446064).

1808923252 is a wasteful number, since it uses less digits than its factorization.

1808923252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393378 (or 393376 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 1808923252 is about 42531.4383956151. The cubic root of 1808923252 is about 1218.4471985084.

The spelling of 1808923252 in words is "one billion, eight hundred eight million, nine hundred twenty-three thousand, two hundred fifty-two".