1809029956 has 24 divisors (see below), whose sum is σ = 3200123360. Its totient is φ = 894756672.

The previous prime is 1809029899. The next prime is 1809029977. The reversal of 1809029956 is 6599209081.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 151600 + ... + 163096.

Almost surely, 2^1809029956 is an apocalyptic number.

It is an amenable number.

1809029956 is a deficient number, since it is larger than the sum of its proper divisors (1391093404).

1809029956 is a wasteful number, since it uses less digits than its factorization.

1809029956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11923 (or 11921 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 49.

The square root of 1809029956 is about 42532.6927903701. The cubic root of 1809029956 is about 1218.4711557867.

The spelling of 1809029956 in words is "one billion, eight hundred nine million, twenty-nine thousand, nine hundred fifty-six".