305406641 has 8 divisors (see below), whose sum is σ = 307890600. Its totient is φ = 302928768.

The previous prime is 305406631. The next prime is 305406659. The reversal of 305406641 is 146604503.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13987600 + 291419041 = 3740^2 + 17071^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-305406641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (305406601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183485 + ... + 185141.

It is an arithmetic number, because the mean of its divisors is an integer number (38486325).

Almost surely, 2^305406641 is an apocalyptic number.

It is an amenable number.

305406641 is a deficient number, since it is larger than the sum of its proper divisors (2483959).

305406641 is a wasteful number, since it uses less digits than its factorization.

305406641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3043.

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

The square root of 305406641 is about 17475.8874166664. The cubic root of 305406641 is about 673.4305675731.

The spelling of 305406641 in words is "three hundred five million, four hundred six thousand, six hundred forty-one".