305180730 has 32 divisors (see below), whose sum is σ = 813816000. Its totient is φ = 81381456.

The previous prime is 305180723. The next prime is 305180737. The reversal of 305180730 is 37081503.

It is an interprime number because it is at equal distance from previous prime (305180723) and next prime (305180737).

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 305180694 and 305180703.

It is not an unprimeable number, because it can be changed into a prime (305180737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 564880 + ... + 565419.

It is an arithmetic number, because the mean of its divisors is an integer number (25431750).

Almost surely, 2^305180730 is an apocalyptic number.

305180730 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

305180730 is an abundant number, since it is smaller than the sum of its proper divisors (508635270).

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

305180730 is a wasteful number, since it uses less digits than its factorization.

305180730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1130315 (or 1130309 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 305180730 is about 17469.4227151329. The cubic root of 305180730 is about 673.2644798289.

The spelling of 305180730 in words is "three hundred five million, one hundred eighty thousand, seven hundred thirty".