72223660 has 48 divisors (see below), whose sum is σ = 156584736. Its totient is φ = 27965952.

The previous prime is 72223651. The next prime is 72223661. The reversal of 72223660 is 6632227.

It is a zygodrome in base 6.

It is not an unprimeable number, because it can be changed into a prime (72223661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117514 + ... + 118126.

It is an arithmetic number, because the mean of its divisors is an integer number (3262182).

Almost surely, 2^72223660 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 72223660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78292368).

72223660 is an abundant number, since it is smaller than the sum of its proper divisors (84361076).

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

72223660 is a wasteful number, since it uses less digits than its factorization.

72223660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802 (or 800 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 72223660 is about 8498.4504469933. The cubic root of 72223660 is about 416.4470892840.

Adding to 72223660 its reverse (6632227), we get a palindrome (78855887).

The spelling of 72223660 in words is "seventy-two million, two hundred twenty-three thousand, six hundred sixty".