228285921920 has 64 divisors (see below), whose sum is σ = 623709763200. Its totient is φ = 78269457408.

The previous prime is 228285921917. The next prime is 228285921949. The reversal of 228285921920 is 29129582822.

228285921920 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×228285921920² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25473860 + ... + 25482819.

It is an arithmetic number, because the mean of its divisors is an integer number (9745465050).

Almost surely, 2^228285921920 is an apocalyptic number.

228285921920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

228285921920 is an abundant number, since it is smaller than the sum of its proper divisors (395423841280).

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

228285921920 is an equidigital number, since it uses as much as digits as its factorization.

228285921920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50956705 (or 50956693 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 50.

The spelling of 228285921920 in words is "two hundred twenty-eight billion, two hundred eighty-five million, nine hundred twenty-one thousand, nine hundred twenty".