309547434 has 32 divisors (see below), whose sum is σ = 708091776. Its totient is φ = 88372800.

The previous prime is 309547423. The next prime is 309547451. The reversal of 309547434 is 434745903.

309547434 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×309547434² = 191639227791968712, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 309547392 and 309547401.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77904 + ... + 81780.

It is an arithmetic number, because the mean of its divisors is an integer number (22127868).

Almost surely, 2^309547434 is an apocalyptic number.

309547434 is an abundant number, since it is smaller than the sum of its proper divisors (398544342).

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

309547434 is a wasteful number, since it uses less digits than its factorization.

309547434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5790.

The product of its (nonzero) digits is 181440, while the sum is 39.

The square root of 309547434 is about 17593.9601568265. The cubic root of 309547434 is about 676.4604384469.

The spelling of 309547434 in words is "three hundred nine million, five hundred forty-seven thousand, four hundred thirty-four".