228145040 has 20 divisors (see below), whose sum is σ = 530437404. Its totient is φ = 91257984.

The previous prime is 228145031. The next prime is 228145051. The reversal of 228145040 is 40541822.

It is a happy number.

228145040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 39137536 + 189007504 = 6256^2 + 13748^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1425827 + ... + 1425986.

Almost surely, 2^228145040 is an apocalyptic number.

228145040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

228145040 is an abundant number, since it is smaller than the sum of its proper divisors (302292364).

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

228145040 is a wasteful number, since it uses less digits than its factorization.

228145040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2851826 (or 2851820 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 26.

The square root of 228145040 is about 15104.4708613046. The cubic root of 228145040 is about 611.0409887830.

Adding to 228145040 its reverse (40541822), we get a palindrome (268686862).

The spelling of 228145040 in words is "two hundred twenty-eight million, one hundred forty-five thousand, forty".