180818840 has 32 divisors (see below), whose sum is σ = 407226960. Its totient is φ = 72259200.

The previous prime is 180818809. The next prime is 180818849. The reversal of 180818840 is 48818081.

It is a junction number, because it is equal to n+sod(n) for n = 180818794 and 180818803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180818849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76070 + ... + 78410.

Almost surely, 2^180818840 is an apocalyptic number.

180818840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

180818840 is an abundant number, since it is smaller than the sum of its proper divisors (226408120).

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

180818840 is a wasteful number, since it uses less digits than its factorization.

180818840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4283 (or 4279 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 38.

The square root of 180818840 is about 13446.8896031759. The cubic root of 180818840 is about 565.4764978117.

The spelling of 180818840 in words is "one hundred eighty million, eight hundred eighteen thousand, eight hundred forty".