347840642728 has 16 divisors (see below), whose sum is σ = 661935552480. Its totient is φ = 171324495408.

The previous prime is 347840642701. The next prime is 347840642753. The reversal of 347840642728 is 827246048743.

It is a super-2 number, since 2×347840642728² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 324477676 + ... + 324478747.

It is an arithmetic number, because the mean of its divisors is an integer number (41370972030).

Almost surely, 2^347840642728 is an apocalyptic number.

It is an amenable number.

347840642728 is a deficient number, since it is larger than the sum of its proper divisors (314094909752).

347840642728 is a wasteful number, since it uses less digits than its factorization.

347840642728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648956496 (or 648956492 counting only the distinct ones).

The product of its (nonzero) digits is 14450688, while the sum is 55.

The spelling of 347840642728 in words is "three hundred forty-seven billion, eight hundred forty million, six hundred forty-two thousand, seven hundred twenty-eight".