228428615856 has 160 divisors (see below), whose sum is σ = 696796672000. Its totient is φ = 63128201472.

The previous prime is 228428615819. The next prime is 228428615861. The reversal of 228428615856 is 658516824822.

It is a super-2 number, since 2×228428615856² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 228428615796 and 228428615805.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1411395 + ... + 1564893.

It is an arithmetic number, because the mean of its divisors is an integer number (4354979200).

Almost surely, 2^228428615856 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 228428615856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (348398336000).

228428615856 is an abundant number, since it is smaller than the sum of its proper divisors (468368056144).

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

228428615856 is a wasteful number, since it uses less digits than its factorization.

228428615856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153663 (or 153657 counting only the distinct ones).

The product of its digits is 14745600, while the sum is 57.

The spelling of 228428615856 in words is "two hundred twenty-eight billion, four hundred twenty-eight million, six hundred fifteen thousand, eight hundred fifty-six".