68747220 has 72 divisors (see below), whose sum is σ = 209873664. Its totient is φ = 18214848.

The previous prime is 68747219. The next prime is 68747227. The reversal of 68747220 is 2274786.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68747227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28917 + ... + 31203.

It is an arithmetic number, because the mean of its divisors is an integer number (2914912).

Almost surely, 2^68747220 is an apocalyptic number.

68747220 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 68747220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104936832).

68747220 is an abundant number, since it is smaller than the sum of its proper divisors (141126444).

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

68747220 is a wasteful number, since it uses less digits than its factorization.

68747220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2469 (or 2464 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 68747220 is about 8291.3943338862. The cubic root of 68747220 is about 409.6551134971.

The spelling of 68747220 in words is "sixty-eight million, seven hundred forty-seven thousand, two hundred twenty".