306140434 has 4 divisors (see below), whose sum is σ = 459210654. Its totient is φ = 153070216.

The previous prime is 306140431. The next prime is 306140441. The reversal of 306140434 is 434041603.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 256480225 + 49660209 = 16015^2 + 7047^2 .

It is a junction number, because it is equal to n+sod(n) for n = 306140399 and 306140408.

It is not an unprimeable number, because it can be changed into a prime (306140431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76535107 + ... + 76535110.

Almost surely, 2^306140434 is an apocalyptic number.

306140434 is a deficient number, since it is larger than the sum of its proper divisors (153070220).

306140434 is a wasteful number, since it uses less digits than its factorization.

306140434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153070219.

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 306140434 is about 17496.8692628138. The cubic root of 306140434 is about 673.9694811941.

The spelling of 306140434 in words is "three hundred six million, one hundred forty thousand, four hundred thirty-four".