305530040 has 32 divisors (see below), whose sum is σ = 697131360. Its totient is φ = 120489600.

The previous prime is 305530031. The next prime is 305530061. The reversal of 305530040 is 40035503.

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

It is a junction number, because it is equal to n+sod(n) for n = 305529994 and 305530021.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 50951 + ... + 56630.

It is an arithmetic number, because the mean of its divisors is an integer number (21785355).

Almost surely, 2^305530040 is an apocalyptic number.

It is an amenable number.

305530040 is an abundant number, since it is smaller than the sum of its proper divisors (391601320).

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

305530040 is a wasteful number, since it uses less digits than its factorization.

305530040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107663 (or 107659 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 20.

The square root of 305530040 is about 17479.4176104354. The cubic root of 305530040 is about 673.5212548271.

Adding to 305530040 its reverse (40035503), we get a palindrome (345565543).

The spelling of 305530040 in words is "three hundred five million, five hundred thirty thousand, forty".