305505630 has 48 divisors (see below), whose sum is σ = 798393024. Its totient is φ = 81049920.

The previous prime is 305505547. The next prime is 305505643. The reversal of 305505630 is 36505503.

It is a happy number.

305505630 is a `hidden beast` number, since 30 + 550 + 56 + 30 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 305505594 and 305505603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9115 + ... + 26345.

It is an arithmetic number, because the mean of its divisors is an integer number (16633188).

Almost surely, 2^305505630 is an apocalyptic number.

305505630 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 305505630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (399196512).

305505630 is an abundant number, since it is smaller than the sum of its proper divisors (492887394).

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

305505630 is a wasteful number, since it uses less digits than its factorization.

305505630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17441 (or 17438 counting only the distinct ones).

The product of its (nonzero) digits is 6750, while the sum is 27.

The square root of 305505630 is about 17478.7193466798. The cubic root of 305505630 is about 673.5033175929.

The spelling of 305505630 in words is "three hundred five million, five hundred five thousand, six hundred thirty".