305122012440 has 128 divisors (see below), whose sum is σ = 1046242690560. Its totient is φ = 69734836224.

The previous prime is 305122012427. The next prime is 305122012471. The reversal of 305122012440 is 44210221503.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 305122012440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14868667 + ... + 14889173.

It is an arithmetic number, because the mean of its divisors is an integer number (8173771020).

Almost surely, 2^305122012440 is an apocalyptic number.

305122012440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

305122012440 is an abundant number, since it is smaller than the sum of its proper divisors (741120678120).

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

305122012440 is a wasteful number, since it uses less digits than its factorization.

305122012440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38241 (or 38237 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 305122012440 its reverse (44210221503), we get a palindrome (349332233943).

The spelling of 305122012440 in words is "three hundred five billion, one hundred twenty-two million, twelve thousand, four hundred forty".