68238720 has 256 divisors, whose sum is σ = 264384000. Its totient is φ = 16496640.

The previous prime is 68238713. The next prime is 68238733. The reversal of 68238720 is 2783286.

It is a happy number.

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 31 ways as a sum of consecutive naturals, for example, 189901 + ... + 190259.

It is an arithmetic number, because the mean of its divisors is an integer number (1032750).

Almost surely, 2^68238720 is an apocalyptic number.

68238720 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 68238720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132192000).

68238720 is an abundant number, since it is smaller than the sum of its proper divisors (196145280).

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

68238720 is a wasteful number, since it uses less digits than its factorization.

68238720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398 (or 380 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 68238720 is about 8260.6730960618. The cubic root of 68238720 is about 408.6425860336.

The spelling of 68238720 in words is "sixty-eight million, two hundred thirty-eight thousand, seven hundred twenty".