68132720 has 20 divisors (see below), whose sum is σ = 158408760. Its totient is φ = 27253056.

The previous prime is 68132717. The next prime is 68132741. The reversal of 68132720 is 2723186.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 425750 + ... + 425909.

It is an arithmetic number, because the mean of its divisors is an integer number (7920438).

Almost surely, 2^68132720 is an apocalyptic number.

It is an amenable number.

68132720 is an abundant number, since it is smaller than the sum of its proper divisors (90276040).

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

68132720 is a wasteful number, since it uses less digits than its factorization.

68132720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851672 (or 851666 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 68132720 is about 8254.2546604766. The cubic root of 68132720 is about 408.4308852956.

The spelling of 68132720 in words is "sixty-eight million, one hundred thirty-two thousand, seven hundred twenty".