68681632 has 48 divisors (see below), whose sum is σ = 144027072. Its totient is φ = 32128000.

The previous prime is 68681629. The next prime is 68681651. The reversal of 68681632 is 23618686.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136293 + ... + 136795.

It is an arithmetic number, because the mean of its divisors is an integer number (3000564).

Almost surely, 2^68681632 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 68681632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72013536).

68681632 is an abundant number, since it is smaller than the sum of its proper divisors (75345440).

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

68681632 is a wasteful number, since it uses less digits than its factorization.

68681632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 781 (or 773 counting only the distinct ones).

The product of its digits is 82944, while the sum is 40.

The square root of 68681632 is about 8287.4382048978. The cubic root of 68681632 is about 409.5247954581.

The spelling of 68681632 in words is "sixty-eight million, six hundred eighty-one thousand, six hundred thirty-two".