656840230 has 16 divisors (see below), whose sum is σ = 1182724704. Its totient is φ = 262644480.

The previous prime is 656840221. The next prime is 656840231. The reversal of 656840230 is 32048656.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656840231) 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, 23839 + ... + 43381.

It is an arithmetic number, because the mean of its divisors is an integer number (73920294).

Almost surely, 2^656840230 is an apocalyptic number.

656840230 is a deficient number, since it is larger than the sum of its proper divisors (525884474).

656840230 is a wasteful number, since it uses less digits than its factorization.

656840230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22911.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 656840230 is about 25628.8944357731. The cubic root of 656840230 is about 869.2671107999.

Adding to 656840230 its reverse (32048656), we get a palindrome (688888886).

The spelling of 656840230 in words is "six hundred fifty-six million, eight hundred forty thousand, two hundred thirty".