228157308 has 18 divisors (see below), whose sum is σ = 576731064. Its totient is φ = 76052424.

The previous prime is 228157291. The next prime is 228157327. The reversal of 228157308 is 803751822.

228157308 is a `hidden beast` number, since 2 + 2 + 81 + 573 + 0 + 8 = 666.

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

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 6337703 = 228157308 / (2 + 2 + 8 + 1 + 5 + 7 + 3 + 0 + 8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3168816 + ... + 3168887.

Almost surely, 2^228157308 is an apocalyptic number.

It is an amenable number.

228157308 is an abundant number, since it is smaller than the sum of its proper divisors (348573756).

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

228157308 is a wasteful number, since it uses less digits than its factorization.

228157308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6337713 (or 6337708 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 228157308 is about 15104.8769607700. The cubic root of 228157308 is about 611.0519410504.

The spelling of 228157308 in words is "two hundred twenty-eight million, one hundred fifty-seven thousand, three hundred eight".