305138045 has 16 divisors (see below), whose sum is σ = 370294848. Its totient is φ = 241372800.

The previous prime is 305138039. The next prime is 305138047. The reversal of 305138045 is 540831503.

It is a de Polignac number, because none of the positive numbers 2^k-305138045 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 305137999 and 305138017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (305138047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 209570 + ... + 211020.

It is an arithmetic number, because the mean of its divisors is an integer number (23143428).

Almost surely, 2^305138045 is an apocalyptic number.

It is an amenable number.

305138045 is a deficient number, since it is larger than the sum of its proper divisors (65156803).

305138045 is a wasteful number, since it uses less digits than its factorization.

305138045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1900.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 305138045 is about 17468.2009663274. The cubic root of 305138045 is about 673.2330889934.

Adding to 305138045 its reverse (540831503), we get a palindrome (845969548).

The spelling of 305138045 in words is "three hundred five million, one hundred thirty-eight thousand, forty-five".