228100140738 has 18 divisors (see below), whose sum is σ = 494221361907. Its totient is φ = 76032704820.

The previous prime is 228100140721. The next prime is 228100140739. The reversal of 228100140738 is 837041001822.

It can be written as a sum of positive squares in only one way, i.e., 114050070369 + 114050070369 = 337713^2 + 337713^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=337713.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (228100140739) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1969993 + ... + 2082563.

Almost surely, 2^228100140738 is an apocalyptic number.

228100140738 is an abundant number, since it is smaller than the sum of its proper divisors (266121221169).

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

228100140738 is an frugal number, since it uses more digits than its factorization.

228100140738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225150 (or 112576 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The spelling of 228100140738 in words is "two hundred twenty-eight billion, one hundred million, one hundred forty thousand, seven hundred thirty-eight".