305138416 has 20 divisors (see below), whose sum is σ = 644952024. Its totient is φ = 138699200.

The previous prime is 305138399. The next prime is 305138417. The reversal of 305138416 is 614831503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (305138417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 866695 + ... + 867046.

Almost surely, 2^305138416 is an apocalyptic number.

It is an amenable number.

305138416 is an abundant number, since it is smaller than the sum of its proper divisors (339813608).

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

305138416 is a wasteful number, since it uses less digits than its factorization.

305138416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1733760 (or 1733754 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 305138416 is about 17468.2115856203. The cubic root of 305138416 is about 673.2333618419.

Adding to 305138416 its reverse (614831503), we get a palindrome (919969919).

The spelling of 305138416 in words is "three hundred five million, one hundred thirty-eight thousand, four hundred sixteen".