1234655940 has 192 divisors, whose sum is σ = 4269888000. Its totient is φ = 265531392.

The previous prime is 1234655881. The next prime is 1234655969. The reversal of 1234655940 is 495564321.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 348096 + ... + 351624.

It is an arithmetic number, because the mean of its divisors is an integer number (22239000).

Almost surely, 2^1234655940 is an apocalyptic number.

1234655940 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 1234655940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2134944000).

1234655940 is an abundant number, since it is smaller than the sum of its proper divisors (3035232060).

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

1234655940 is a wasteful number, since it uses less digits than its factorization.

1234655940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3579 (or 3563 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 39.

The square root of 1234655940 is about 35137.6712375763. The cubic root of 1234655940 is about 1072.7914824371.

It can be divided in two parts, 12346 and 55940, that added together give a palindrome (68286).

The spelling of 1234655940 in words is "one billion, two hundred thirty-four million, six hundred fifty-five thousand, nine hundred forty".