304728402681 has 6 divisors (see below), whose sum is σ = 440163248330. Its totient is φ = 203152268448.

The previous prime is 304728402673. The next prime is 304728402683. The reversal of 304728402681 is 186204827403.

It is a happy number.

304728402681 is a `hidden beast` number, since 3 + 0 + 472 + 84 + 0 + 26 + 81 = 666.

It can be written as a sum of positive squares in only one way, i.e., 267893197056 + 36835205625 = 517584^2 + 191925^2 .

It is not a de Polignac number, because 304728402681 - 2³ = 304728402673 is a prime.

It is a super-2 number, since 2×304728402681² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (304728402683) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 16929355696 + ... + 16929355713.

Almost surely, 2^304728402681 is an apocalyptic number.

It is an amenable number.

304728402681 is a deficient number, since it is larger than the sum of its proper divisors (135434845649).

304728402681 is a wasteful number, since it uses less digits than its factorization.

304728402681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33858711415 (or 33858711412 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 45.

The spelling of 304728402681 in words is "three hundred four billion, seven hundred twenty-eight million, four hundred two thousand, six hundred eighty-one".