68940720 has 100 divisors (see below), whose sum is σ = 239463840. Its totient is φ = 18382464.

The previous prime is 68940671. The next prime is 68940749. The reversal of 68940720 is 2704986.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1161 + ... + 11799.

Almost surely, 2^68940720 is an apocalyptic number.

68940720 is a gapful number since it is divisible by the number (60) 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 68940720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119731920).

68940720 is an abundant number, since it is smaller than the sum of its proper divisors (170523120).

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

68940720 is a wasteful number, since it uses less digits than its factorization.

68940720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10664 (or 10649 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 68940720 is about 8303.0548595080. The cubic root of 68940720 is about 410.0390999792.

The spelling of 68940720 in words is "sixty-eight million, nine hundred forty thousand, seven hundred twenty".