72222064 has 40 divisors (see below), whose sum is σ = 149454720. Its totient is φ = 33734400.

The previous prime is 72222061. The next prime is 72222071. The reversal of 72222064 is 46022227.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72222061) 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, 11874 + ... + 16894.

It is an arithmetic number, because the mean of its divisors is an integer number (3736368).

Almost surely, 2^72222064 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 72222064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74727360).

72222064 is an abundant number, since it is smaller than the sum of its proper divisors (77232656).

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

72222064 is a wasteful number, since it uses less digits than its factorization.

72222064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5089 (or 5083 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 72222064 is about 8498.3565470037. The cubic root of 72222064 is about 416.4440217091. Note that the first 3 decimals are identical.

The spelling of 72222064 in words is "seventy-two million, two hundred twenty-two thousand, sixty-four".