68643732 has 96 divisors (see below), whose sum is σ = 177049600. Its totient is φ = 20621952.

The previous prime is 68643691. The next prime is 68643737. The reversal of 68643732 is 23734686.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68643737) 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 31 ways as a sum of consecutive naturals, for example, 666393 + ... + 666495.

Almost surely, 2^68643732 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68643732, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88524800).

68643732 is an abundant number, since it is smaller than the sum of its proper divisors (108405868).

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

68643732 is a wasteful number, since it uses less digits than its factorization.

68643732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245 (or 243 counting only the distinct ones).

The product of its digits is 145152, while the sum is 39.

The square root of 68643732 is about 8285.1512961442. The cubic root of 68643732 is about 409.4494534046.

The spelling of 68643732 in words is "sixty-eight million, six hundred forty-three thousand, seven hundred thirty-two".