309147044 has 12 divisors (see below), whose sum is σ = 543005568. Its totient is φ = 154002600.

The previous prime is 309147019. The next prime is 309147073. The reversal of 309147044 is 440741903.

It is a happy number.

309147044 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 309147044.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141512 + ... + 143679.

It is an arithmetic number, because the mean of its divisors is an integer number (45250464).

Almost surely, 2^309147044 is an apocalyptic number.

It is an amenable number.

309147044 is a deficient number, since it is larger than the sum of its proper divisors (233858524).

309147044 is a wasteful number, since it uses less digits than its factorization.

309147044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285466 (or 285464 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 309147044 is about 17582.5778542283. The cubic root of 309147044 is about 676.1686524103.

Adding to 309147044 its reverse (440741903), we get a palindrome (749888947).

The spelling of 309147044 in words is "three hundred nine million, one hundred forty-seven thousand, forty-four".