656284321 has 8 divisors (see below), whose sum is σ = 818224704. Its totient is φ = 511390320.

The previous prime is 656284283. The next prime is 656284331. The reversal of 656284321 is 123482656.

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

It is not a de Polignac number, because 656284321 - 2¹¹ = 656282273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (656284331) 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, 4261510 + ... + 4261663.

It is an arithmetic number, because the mean of its divisors is an integer number (102278088).

Almost surely, 2^656284321 is an apocalyptic number.

It is an amenable number.

656284321 is a deficient number, since it is larger than the sum of its proper divisors (161940383).

656284321 is a wasteful number, since it uses less digits than its factorization.

656284321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8523191.

The product of its digits is 69120, while the sum is 37.

The square root of 656284321 is about 25618.0467834689. The cubic root of 656284321 is about 869.0218102541.

The spelling of 656284321 in words is "six hundred fifty-six million, two hundred eighty-four thousand, three hundred twenty-one".