228136657 has 32 divisors (see below), whose sum is σ = 277954560. Its totient is φ = 183159360.

The previous prime is 228136627. The next prime is 228136681. The reversal of 228136657 is 756631822.

228136657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

228136657 is an esthetic number in base 6, because in such base its adjacent digits differ by 1.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228136657 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228136627) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1318623 + ... + 1318795.

It is an arithmetic number, because the mean of its divisors is an integer number (8686080).

Almost surely, 2^228136657 is an apocalyptic number.

It is an amenable number.

228136657 is a deficient number, since it is larger than the sum of its proper divisors (49817903).

228136657 is a wasteful number, since it uses less digits than its factorization.

228136657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373.

The product of its digits is 120960, while the sum is 40.

The square root of 228136657 is about 15104.1933581373. The cubic root of 228136657 is about 611.0335046268.

The spelling of 228136657 in words is "two hundred twenty-eight million, one hundred thirty-six thousand, six hundred fifty-seven".