64830305 has 8 divisors (see below), whose sum is σ = 77841000. Its totient is φ = 51834496.

The previous prime is 64830301. The next prime is 64830317. The reversal of 64830305 is 50303846.

It can be written as a sum of positive squares in 4 ways, for example, as 27290176 + 37540129 = 5224^2 + 6127^2 .

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 64830305 - 2² = 64830301 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64830301) 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, 11621 + ... + 16269.

It is an arithmetic number, because the mean of its divisors is an integer number (9730125).

Almost surely, 2^64830305 is an apocalyptic number.

64830305 is the 4649-th octagonal number.

It is an amenable number.

64830305 is a deficient number, since it is larger than the sum of its proper divisors (13010695).

64830305 is a wasteful number, since it uses less digits than its factorization.

64830305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7443.

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

The square root of 64830305 is about 8051.7268334190. The cubic root of 64830305 is about 401.7223749993.

The spelling of 64830305 in words is "sixty-four million, eight hundred thirty thousand, three hundred five".