228705723842 has 6 divisors (see below), whose sum is σ = 343059600249. Its totient is φ = 114352523760.

The previous prime is 228705723839. The next prime is 228705723881. The reversal of 228705723842 is 248327507822.

It can be written as a sum of positive squares in 2 ways, for example, as 198845538241 + 29860185601 = 445921^2 + 172801^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=338161.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 507242 + ... + 845402.

Almost surely, 2^228705723842 is an apocalyptic number.

228705723842 is a deficient number, since it is larger than the sum of its proper divisors (114353876407).

228705723842 is an frugal number, since it uses more digits than its factorization.

228705723842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676324 (or 338163 counting only the distinct ones).

The product of its (nonzero) digits is 3010560, while the sum is 50.

Multiplying 228705723842 by its sum of digits (50), we get a square (11435286192100 = 3381610²).

The spelling of 228705723842 in words is "two hundred twenty-eight billion, seven hundred five million, seven hundred twenty-three thousand, eight hundred forty-two".