1234232640 has 280 divisors, whose sum is σ = 4650300072. Its totient is φ = 309657600.

The previous prime is 1234232639. The next prime is 1234232707. The reversal of 1234232640 is 462324321.

1234232640 is a `hidden beast` number, since 12 + 3 + 4 + 2 + 3 + 2 + 640 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 257795136 + 976437504 = 16056^2 + 31248^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 439240 + ... + 442040.

Almost surely, 2^1234232640 is an apocalyptic number.

1234232640 is a gapful number since it is divisible by the number (10) 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 1234232640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2325150036).

1234232640 is an abundant number, since it is smaller than the sum of its proper divisors (3416067432).

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

1234232640 is a wasteful number, since it uses less digits than its factorization.

1234232640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2847 (or 2828 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 1234232640 is about 35131.6472713706. The cubic root of 1234232640 is about 1072.6688667547.

Adding to 1234232640 its reverse (462324321), we get a palindrome (1696556961).

The spelling of 1234232640 in words is "one billion, two hundred thirty-four million, two hundred thirty-two thousand, six hundred forty".