1808940328 has 32 divisors (see below), whose sum is σ = 3679358760. Its totient is φ = 828794880.

The previous prime is 1808940283. The next prime is 1808940359. The reversal of 1808940328 is 8230498081.

It can be written as a sum of positive squares in 4 ways, for example, as 1742060644 + 66879684 = 41738^2 + 8178^2 .

It is a super-2 number, since 2×1808940328² = 6544530220529495168, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49233 + ... + 77728.

Almost surely, 2^1808940328 is an apocalyptic number.

It is an amenable number.

1808940328 is an abundant number, since it is smaller than the sum of its proper divisors (1870418432).

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

1808940328 is a wasteful number, since it uses less digits than its factorization.

1808940328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127117 (or 127113 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 43.

The square root of 1808940328 is about 42531.6391407620. The cubic root of 1808940328 is about 1218.4510324906.

The spelling of 1808940328 in words is "one billion, eight hundred eight million, nine hundred forty thousand, three hundred twenty-eight".