428646261 has 8 divisors (see below), whose sum is σ = 573920640. Its totient is φ = 284568032.

The previous prime is 428646227. The next prime is 428646271. The reversal of 428646261 is 162646824.

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 428646261 - 2⁷ = 428646133 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428646271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 298200 + ... + 299633.

It is an arithmetic number, because the mean of its divisors is an integer number (71740080).

Almost surely, 2^428646261 is an apocalyptic number.

It is an amenable number.

428646261 is a deficient number, since it is larger than the sum of its proper divisors (145274379).

428646261 is a wasteful number, since it uses less digits than its factorization.

428646261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598075.

The product of its digits is 110592, while the sum is 39.

The square root of 428646261 is about 20703.7740762403. The cubic root of 428646261 is about 753.9913205783.

The spelling of 428646261 in words is "four hundred twenty-eight million, six hundred forty-six thousand, two hundred sixty-one".