305449947 has 40 divisors (see below), whose sum is σ = 523997760. Its totient is φ = 175368240.

The previous prime is 305449939. The next prime is 305449951. The reversal of 305449947 is 749944503.

It is a happy number.

It is not a de Polignac number, because 305449947 - 2³ = 305449939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (305449927) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 7908 + ... + 25950.

It is an arithmetic number, because the mean of its divisors is an integer number (13099944).

Almost surely, 2^305449947 is an apocalyptic number.

305449947 is a deficient number, since it is larger than the sum of its proper divisors (218547813).

305449947 is a wasteful number, since it uses less digits than its factorization.

305449947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18085 (or 18076 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 45.

The square root of 305449947 is about 17477.1263942331. The cubic root of 305449947 is about 673.4623964005.

The spelling of 305449947 in words is "three hundred five million, four hundred forty-nine thousand, nine hundred forty-seven".