430728661 has 6 divisors (see below), whose sum is σ = 473445686. Its totient is φ = 391571400.

The previous prime is 430728647. The next prime is 430728667. The reversal of 430728661 is 166827034.

It can be written as a sum of positive squares in only one way, i.e., 368870436 + 61858225 = 19206^2 + 7865^2 .

It is not a de Polignac number, because 430728661 - 2⁷ = 430728533 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 430728661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (430728667) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1779750 + ... + 1779991.

Almost surely, 2^430728661 is an apocalyptic number.

It is an amenable number.

430728661 is a deficient number, since it is larger than the sum of its proper divisors (42717025).

430728661 is a wasteful number, since it uses less digits than its factorization.

430728661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3559763 (or 3559752 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 430728661 is about 20754.0034933022. The cubic root of 430728661 is about 755.2103333403.

The spelling of 430728661 in words is "four hundred thirty million, seven hundred twenty-eight thousand, six hundred sixty-one".