68236220 has 72 divisors (see below), whose sum is σ = 163092384. Its totient is φ = 23836032.

The previous prime is 68236219. The next prime is 68236229. The reversal of 68236220 is 2263286.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68236229) 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, 93497 + ... + 94223.

It is an arithmetic number, because the mean of its divisors is an integer number (2265172).

Almost surely, 2^68236220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68236220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81546192).

68236220 is an abundant number, since it is smaller than the sum of its proper divisors (94856164).

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

68236220 is a wasteful number, since it uses less digits than its factorization.

68236220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787 (or 766 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 68236220 is about 8260.5217752876. The cubic root of 68236220 is about 408.6375956169.

The spelling of 68236220 in words is "sixty-eight million, two hundred thirty-six thousand, two hundred twenty".