305342120 has 32 divisors (see below), whose sum is σ = 690525000. Its totient is φ = 121513728.

The previous prime is 305342101. The next prime is 305342123. The reversal of 305342120 is 21243503.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 299359204 + 5982916 = 17302^2 + 2446^2 .

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 = 305342092 and 305342101.

It is not an unprimeable number, because it can be changed into a prime (305342123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11495 + ... + 27254.

Almost surely, 2^305342120 is an apocalyptic number.

It is an amenable number.

305342120 is an abundant number, since it is smaller than the sum of its proper divisors (385182880).

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

305342120 is a wasteful number, since it uses less digits than its factorization.

305342120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38957 (or 38953 counting only the distinct ones).

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

The square root of 305342120 is about 17474.0413184815. The cubic root of 305342120 is about 673.3831406696.

Adding to 305342120 its reverse (21243503), we get a palindrome (326585623).

The spelling of 305342120 in words is "three hundred five million, three hundred forty-two thousand, one hundred twenty".