180989860 has 12 divisors (see below), whose sum is σ = 380078748. Its totient is φ = 72395936.

The previous prime is 180989843. The next prime is 180989917. The reversal of 180989860 is 68989081.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 25887744 + 155102116 = 5088^2 + 12454^2 .

It is a super-3 number, since 3×180989860³ (a number of 26 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4524727 + ... + 4524766.

It is an arithmetic number, because the mean of its divisors is an integer number (31673229).

Almost surely, 2^180989860 is an apocalyptic number.

180989860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

180989860 is an abundant number, since it is smaller than the sum of its proper divisors (199088888).

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

180989860 is a wasteful number, since it uses less digits than its factorization.

180989860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9049502 (or 9049500 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 49.

The square root of 180989860 is about 13453.2471916634. The cubic root of 180989860 is about 565.6547191328.

The spelling of 180989860 in words is "one hundred eighty million, nine hundred eighty-nine thousand, eight hundred sixty".