228891536 has 40 divisors (see below), whose sum is σ = 472469760. Its totient is φ = 107047424.

The previous prime is 228891521. The next prime is 228891539. The reversal of 228891536 is 635198822.

228891536 = T₃₀₃ + T₃₀₄ + ... + T₁₁₁₈.

It is not an unprimeable number, because it can be changed into a prime (228891539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42905 + ... + 47943.

It is an arithmetic number, because the mean of its divisors is an integer number (11811744).

Almost surely, 2^228891536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 228891536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236234880).

228891536 is an abundant number, since it is smaller than the sum of its proper divisors (243578224).

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

228891536 is a wasteful number, since it uses less digits than its factorization.

228891536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5231 (or 5225 counting only the distinct ones).

The product of its digits is 207360, while the sum is 44.

The square root of 228891536 is about 15129.1617745333. The cubic root of 228891536 is about 611.7067101101.

The spelling of 228891536 in words is "two hundred twenty-eight million, eight hundred ninety-one thousand, five hundred thirty-six".