72227520 has 168 divisors, whose sum is σ = 256763520. Its totient is φ = 18616320.

The previous prime is 72227501. The next prime is 72227539. The reversal of 72227520 is 2572227.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (72227501) and next prime (72227539).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 88876 + ... + 89684.

Almost surely, 2^72227520 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 72227520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128381760).

72227520 is an abundant number, since it is smaller than the sum of its proper divisors (184536000).

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

72227520 is a wasteful number, since it uses less digits than its factorization.

72227520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 863 (or 850 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 27.

The square root of 72227520 is about 8498.6775441830. The cubic root of 72227520 is about 416.4545081692.

Adding to 72227520 its reverse (2572227), we get a palindrome (74799747).

The spelling of 72227520 in words is "seventy-two million, two hundred twenty-seven thousand, five hundred twenty".