68720000 has 80 divisors (see below), whose sum is σ = 171273300. Its totient is φ = 27456000.

The previous prime is 68719993. The next prime is 68720009. The reversal of 68720000 is 2786.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68720009) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 79571 + ... + 80429.

Almost surely, 2^68720000 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 68720000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85636650).

68720000 is an abundant number, since it is smaller than the sum of its proper divisors (102553300).

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

68720000 is an frugal number, since it uses more digits than its factorization.

68720000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 893 (or 866 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 68720000 is about 8289.7527104251. The cubic root of 68720000 is about 409.6010396295.

Adding to 68720000 its reverse (2786), we get a palindrome (68722786).

The spelling of 68720000 in words is "sixty-eight million, seven hundred twenty thousand".