306840641 has 8 divisors (see below), whose sum is σ = 309222144. Its totient is φ = 304468560.

The previous prime is 306840587. The next prime is 306840673. The reversal of 306840641 is 146048603.

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

It is a cyclic number.

It is not a de Polignac number, because 306840641 - 2⁶ = 306840577 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 306840598 and 306840607.

It is not an unprimeable number, because it can be changed into a prime (306840041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71735 + ... + 75891.

It is an arithmetic number, because the mean of its divisors is an integer number (38652768).

Almost surely, 2^306840641 is an apocalyptic number.

It is an amenable number.

306840641 is a deficient number, since it is larger than the sum of its proper divisors (2381503).

306840641 is a wasteful number, since it uses less digits than its factorization.

306840641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4711.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 306840641 is about 17516.8673283781. The cubic root of 306840641 is about 674.4829261808.

The spelling of 306840641 in words is "three hundred six million, eight hundred forty thousand, six hundred forty-one".