68438220 has 24 divisors (see below), whose sum is σ = 191627184. Its totient is φ = 18250176.

The previous prime is 68438219. The next prime is 68438221. The reversal of 68438220 is 2283486.

It is an interprime number because it is at equal distance from previous prime (68438219) and next prime (68438221).

It is not an unprimeable number, because it can be changed into a prime (68438221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 570259 + ... + 570378.

It is an arithmetic number, because the mean of its divisors is an integer number (7984466).

Almost surely, 2^68438220 is an apocalyptic number.

68438220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68438220 is an abundant number, since it is smaller than the sum of its proper divisors (123188964).

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

68438220 is a wasteful number, since it uses less digits than its factorization.

68438220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1140649 (or 1140647 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 68438220 is about 8272.7395704204. The cubic root of 68438220 is about 409.0404289676.

The spelling of 68438220 in words is "sixty-eight million, four hundred thirty-eight thousand, two hundred twenty".