305213004 has 72 divisors (see below), whose sum is σ = 783630848. Its totient is φ = 100154880.

The previous prime is 305212993. The next prime is 305213009. The reversal of 305213004 is 400312503.

305213004 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not an unprimeable number, because it can be changed into a prime (305213009) 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, 1101714 + ... + 1101990.

Almost surely, 2^305213004 is an apocalyptic number.

It is an amenable number.

305213004 is an abundant number, since it is smaller than the sum of its proper divisors (478417844).

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

305213004 is a wasteful number, since it uses less digits than its factorization.

305213004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655 (or 650 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 305213004 is about 17470.3464190038. The cubic root of 305213004 is about 673.2882124020.

Adding to 305213004 its reverse (400312503), we get a palindrome (705525507).

The spelling of 305213004 in words is "three hundred five million, two hundred thirteen thousand, four".