305130440 has 32 divisors (see below), whose sum is σ = 691796160. Its totient is φ = 121118400.

The previous prime is 305130407. The next prime is 305130461. The reversal of 305130440 is 44031503.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 23876 + ... + 34355.

It is an arithmetic number, because the mean of its divisors is an integer number (21618630).

Almost surely, 2^305130440 is an apocalyptic number.

It is an amenable number.

305130440 is an abundant number, since it is smaller than the sum of its proper divisors (386665720).

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

305130440 is a wasteful number, since it uses less digits than its factorization.

305130440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58373 (or 58369 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 305130440 is about 17467.9832837108. The cubic root of 305130440 is about 673.2274959181.

Adding to 305130440 its reverse (44031503), we get a palindrome (349161943).

The spelling of 305130440 in words is "three hundred five million, one hundred thirty thousand, four hundred forty".