306731278628 has 6 divisors (see below), whose sum is σ = 536779737606. Its totient is φ = 153365639312.

The previous prime is 306731278603. The next prime is 306731278643. The reversal of 306731278628 is 826872137603.

It can be written as a sum of positive squares in only one way, i.e., 305862090304 + 869188324 = 553048^2 + 29482^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 306731278628.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38341409825 + ... + 38341409832.

It is an arithmetic number, because the mean of its divisors is an integer number (89463289601).

Almost surely, 2^306731278628 is an apocalyptic number.

It is an amenable number.

306731278628 is a deficient number, since it is larger than the sum of its proper divisors (230048458978).

306731278628 is a wasteful number, since it uses less digits than its factorization.

306731278628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76682819661 (or 76682819659 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 53.

The spelling of 306731278628 in words is "three hundred six billion, seven hundred thirty-one million, two hundred seventy-eight thousand, six hundred twenty-eight".