1808969830 has 64 divisors (see below), whose sum is σ = 3595078080. Its totient is φ = 652288000.

The previous prime is 1808969819. The next prime is 1808969843. The reversal of 1808969830 is 389698081.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 644430 + ... + 647230.

It is an arithmetic number, because the mean of its divisors is an integer number (56173095).

Almost surely, 2^1808969830 is an apocalyptic number.

1808969830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1808969830 is a deficient number, since it is larger than the sum of its proper divisors (1786108250).

1808969830 is a wasteful number, since it uses less digits than its factorization.

1808969830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2985.

The product of its (nonzero) digits is 746496, while the sum is 52.

The square root of 1808969830 is about 42531.9859635075. The cubic root of 1808969830 is about 1218.4576563588.

The spelling of 1808969830 in words is "one billion, eight hundred eight million, nine hundred sixty-nine thousand, eight hundred thirty".