228021562720 has 576 divisors, whose sum is σ = 683790750720. Its totient is φ = 71400849408.

The previous prime is 228021562709. The next prime is 228021562781. The reversal of 228021562720 is 27265120822.

It is a self number, because there is not a number n which added to its sum of digits gives 228021562720.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 621311977 + ... + 621312343.

It is an arithmetic number, because the mean of its divisors is an integer number (1187136720).

Almost surely, 2^228021562720 is an apocalyptic number.

228021562720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 228021562720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (341895375360).

228021562720 is an abundant number, since it is smaller than the sum of its proper divisors (455769188000).

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

228021562720 is a wasteful number, since it uses less digits than its factorization.

228021562720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555 (or 540 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 37.

The spelling of 228021562720 in words is "two hundred twenty-eight billion, twenty-one million, five hundred sixty-two thousand, seven hundred twenty".