228140636 has 12 divisors (see below), whose sum is σ = 401555112. Its totient is φ = 113410608.

The previous prime is 228140623. The next prime is 228140639. The reversal of 228140636 is 636041822.

228140636 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228140639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164150 + ... + 165533.

It is an arithmetic number, because the mean of its divisors is an integer number (33462926).

Almost surely, 2^228140636 is an apocalyptic number.

It is an amenable number.

228140636 is a deficient number, since it is larger than the sum of its proper divisors (173414476).

228140636 is a wasteful number, since it uses less digits than its factorization.

228140636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329860 (or 329858 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 228140636 is about 15104.3250759509. The cubic root of 228140636 is about 611.0370570124.

The spelling of 228140636 in words is "two hundred twenty-eight million, one hundred forty thousand, six hundred thirty-six".