656214040 has 16 divisors (see below), whose sum is σ = 1476481680. Its totient is φ = 262485600.

The previous prime is 656214023. The next prime is 656214049. The reversal of 656214040 is 40412656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656214049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8202636 + ... + 8202715.

It is an arithmetic number, because the mean of its divisors is an integer number (92280105).

Almost surely, 2^656214040 is an apocalyptic number.

It is an amenable number.

656214040 is an abundant number, since it is smaller than the sum of its proper divisors (820267640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

656214040 is a wasteful number, since it uses less digits than its factorization.

656214040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16405362 (or 16405358 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 656214040 is about 25616.6750379514. The cubic root of 656214040 is about 868.9907881802.

Adding to 656214040 its reverse (40412656), we get a palindrome (696626696).

It can be divided in two parts, 6562 and 14040, that added together give a palindrome (20602).

The spelling of 656214040 in words is "six hundred fifty-six million, two hundred fourteen thousand, forty".