68738220 has 120 divisors (see below), whose sum is σ = 217834848. Its totient is φ = 18144000.

The previous prime is 68738213. The next prime is 68738231. The reversal of 68738220 is 2283786.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 244480 + ... + 244760.

Almost surely, 2^68738220 is an apocalyptic number.

68738220 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 68738220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108917424).

68738220 is an abundant number, since it is smaller than the sum of its proper divisors (149096628).

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

68738220 is a wasteful number, since it uses less digits than its factorization.

68738220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453 (or 442 counting only the distinct ones).

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

The square root of 68738220 is about 8290.8515847288. The cubic root of 68738220 is about 409.6372361346.

The spelling of 68738220 in words is "sixty-eight million, seven hundred thirty-eight thousand, two hundred twenty".