180307730 has 16 divisors (see below), whose sum is σ = 325975320. Its totient is φ = 71807232.

The previous prime is 180307727. The next prime is 180307753. The reversal of 180307730 is 37703081.

It can be written as a sum of positive squares in 4 ways, for example, as 145178401 + 35129329 = 12049^2 + 5927^2 .

It is a junction number, because it is equal to n+sod(n) for n = 180307693 and 180307702.

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, 37079 + ... + 41658.

Almost surely, 2^180307730 is an apocalyptic number.

180307730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

180307730 is a deficient number, since it is larger than the sum of its proper divisors (145667590).

180307730 is a wasteful number, since it uses less digits than its factorization.

180307730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78973.

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 180307730 is about 13427.8713875283. The cubic root of 180307730 is about 564.9431952706.

The spelling of 180307730 in words is "one hundred eighty million, three hundred seven thousand, seven hundred thirty".