306640514 has 4 divisors (see below), whose sum is σ = 459960774. Its totient is φ = 153320256.

The previous prime is 306640507. The next prime is 306640559. The reversal of 306640514 is 415046603.

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., 261307225 + 45333289 = 16165^2 + 6733^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76660127 + ... + 76660130.

Almost surely, 2^306640514 is an apocalyptic number.

306640514 is a deficient number, since it is larger than the sum of its proper divisors (153320260).

306640514 is a wasteful number, since it uses less digits than its factorization.

306640514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153320259.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 306640514 is about 17511.1539882442. The cubic root of 306640514 is about 674.3362576466.

The spelling of 306640514 in words is "three hundred six million, six hundred forty thousand, five hundred fourteen".