1230040656 has 120 divisors (see below), whose sum is σ = 3758407016. Its totient is φ = 373248000.

The previous prime is 1230040577. The next prime is 1230040657. The reversal of 1230040656 is 6560400321.

1230040656 is a `hidden beast` number, since 1 + 2 + 3 + 0 + 0 + 4 + 0 + 656 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 3920400 + 1226120256 = 1980^2 + 35016^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1230040657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 132156 + ... + 141156.

Almost surely, 2^1230040656 is an apocalyptic number.

1230040656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1230040656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1879203508).

1230040656 is an abundant number, since it is smaller than the sum of its proper divisors (2528366360).

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

1230040656 is a wasteful number, since it uses less digits than its factorization.

1230040656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9101 (or 9092 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 1230040656 is about 35071.9354470209. The cubic root of 1230040656 is about 1071.4530745787.

Adding to 1230040656 its reverse (6560400321), we get a palindrome (7790440977).

The spelling of 1230040656 in words is "one billion, two hundred thirty million, forty thousand, six hundred fifty-six".