656930 has 16 divisors (see below), whose sum is σ = 1192320. Its totient is φ = 260592.

The previous prime is 656923. The next prime is 656939. The reversal of 656930 is 39656.

656930 is nontrivially palindromic in base 8.

It is a junction number, because it is equal to n+sod(n) for n = 656893 and 656902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656939) by changing a digit.

656930 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1607 + ... + 1973.

It is an arithmetic number, because the mean of its divisors is an integer number (74520).

2⁶⁵⁶⁹³⁰ is an apocalyptic number.

656930 is a deficient number, since it is larger than the sum of its proper divisors (535390).

656930 is a wasteful number, since it uses less digits than its factorization.

656930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553.

The product of its (nonzero) digits is 4860, while the sum is 29.

The square root of 656930 is about 810.5121837456. The cubic root of 656930 is about 86.9306709752.

The spelling of 656930 in words is "six hundred fifty-six thousand, nine hundred thirty".