305030520 has 96 divisors (see below), whose sum is σ = 993610800. Its totient is φ = 81156096.

The previous prime is 305030513. The next prime is 305030521. The reversal of 305030520 is 25030503.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 305030493 and 305030502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (305030521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 241651 + ... + 242909.

Almost surely, 2^305030520 is an apocalyptic number.

305030520 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 305030520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (496805400).

305030520 is an abundant number, since it is smaller than the sum of its proper divisors (688580280).

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

305030520 is a wasteful number, since it uses less digits than its factorization.

305030520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1949 (or 1942 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 18.

The square root of 305030520 is about 17465.1229597733. The cubic root of 305030520 is about 673.1540014092.

The spelling of 305030520 in words is "three hundred five million, thirty thousand, five hundred twenty".