309130434 has 24 divisors (see below), whose sum is σ = 670110012. Its totient is φ = 102993120.

The previous prime is 309130433. The next prime is 309130439. The reversal of 309130434 is 434031903.

It can be written as a sum of positive squares in 2 ways, for example, as 257506209 + 51624225 = 16047^2 + 7185^2 .

It is a junction number, because it is equal to n+sod(n) for n = 309130398 and 309130407.

It is not an unprimeable number, because it can be changed into a prime (309130433) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61164 + ... + 66024.

Almost surely, 2^309130434 is an apocalyptic number.

309130434 is an abundant number, since it is smaller than the sum of its proper divisors (360979578).

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

309130434 is a wasteful number, since it uses less digits than its factorization.

309130434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8402 (or 8399 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 309130434 is about 17582.1055053142. The cubic root of 309130434 is about 676.1565423560.

The spelling of 309130434 in words is "three hundred nine million, one hundred thirty thousand, four hundred thirty-four".