181080630 has 32 divisors (see below), whose sum is σ = 482882400. Its totient is φ = 48288096.

The previous prime is 181080619. The next prime is 181080631. The reversal of 181080630 is 36080181.

181080630 is a `hidden beast` number, since 18 + 10 + 8 + 0 + 630 = 666.

It is a super-2 number, since 2×181080630² = 65580389122393800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 181080594 and 181080603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181080631) 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 15 ways as a sum of consecutive naturals, for example, 335065 + ... + 335604.

It is an arithmetic number, because the mean of its divisors is an integer number (15090075).

Almost surely, 2^181080630 is an apocalyptic number.

181080630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

181080630 is an abundant number, since it is smaller than the sum of its proper divisors (301801770).

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

181080630 is a wasteful number, since it uses less digits than its factorization.

181080630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670685 (or 670679 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 181080630 is about 13456.6203037761. The cubic root of 181080630 is about 565.7492656778.

The spelling of 181080630 in words is "one hundred eighty-one million, eighty thousand, six hundred thirty".