68464220 has 72 divisors (see below), whose sum is σ = 166462800. Its totient is φ = 23569920.

The previous prime is 68464211. The next prime is 68464223. The reversal of 68464220 is 2246486.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68464223) 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, 45236 + ... + 46724.

Almost surely, 2^68464220 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 68464220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83231400).

68464220 is an abundant number, since it is smaller than the sum of its proper divisors (97998580).

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

68464220 is a wasteful number, since it uses less digits than its factorization.

68464220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1539 (or 1526 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 68464220 is about 8274.3108474362. The cubic root of 68464220 is about 409.0922212004.

The spelling of 68464220 in words is "sixty-eight million, four hundred sixty-four thousand, two hundred twenty".