228526308 has 72 divisors (see below), whose sum is σ = 614112408. Its totient is φ = 71405568.

The previous prime is 228526297. The next prime is 228526373. The reversal of 228526308 is 803625822.

228526308 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 4 ways, for example, as 8538084 + 219988224 = 2922^2 + 14832^2 .

It is a super-2 number, since 2×228526308² = 104448546896221728, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 190960 + ... + 192152.

It is an arithmetic number, because the mean of its divisors is an integer number (8529339).

Almost surely, 2^228526308 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 228526308, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (307056204).

228526308 is an abundant number, since it is smaller than the sum of its proper divisors (385586100).

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

228526308 is a wasteful number, since it uses less digits than its factorization.

228526308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1533 (or 1528 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 228526308 is about 15117.0866240820. The cubic root of 228526308 is about 611.3811827794.

The spelling of 228526308 in words is "two hundred twenty-eight million, five hundred twenty-six thousand, three hundred eight".