305213534305240 has 128 divisors (see below), whose sum is σ = 766154868480000. Its totient is φ = 108496874304000.

The previous prime is 305213534305237. The next prime is 305213534305247. The reversal of 305213534305240 is 42503435312503.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 305213534305193 and 305213534305202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (305213534305247) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39957540 + ... + 46979059.

It is an arithmetic number, because the mean of its divisors is an integer number (5985584910000).

Almost surely, 2^{305213534305240} is an apocalyptic number.

It is an amenable number.

305213534305240 is an abundant number, since it is smaller than the sum of its proper divisors (460941334174760).

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

305213534305240 is a wasteful number, since it uses less digits than its factorization.

305213534305240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86936801 (or 86936797 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 40.

Adding to 305213534305240 its reverse (42503435312503), we get a palindrome (347716969617743).

The spelling of 305213534305240 in words is "three hundred five trillion, two hundred thirteen billion, five hundred thirty-four million, three hundred five thousand, two hundred forty".