228526172 has 72 divisors (see below), whose sum is σ = 501731328. Its totient is φ = 89107200.

The previous prime is 228526159. The next prime is 228526187. The reversal of 228526172 is 271625822.

228526172 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×228526172² = 104448422577947168, which contains 22 as substring.

It is a congruent number.

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, 250397 + ... + 251307.

Almost surely, 2^228526172 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 228526172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (250865664).

228526172 is an abundant number, since it is smaller than the sum of its proper divisors (273205156).

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

228526172 is a wasteful number, since it uses less digits than its factorization.

228526172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987 (or 968 counting only the distinct ones).

The product of its digits is 26880, while the sum is 35.

The square root of 228526172 is about 15117.0821258601. The cubic root of 228526172 is about 611.3810614981.

The spelling of 228526172 in words is "two hundred twenty-eight million, five hundred twenty-six thousand, one hundred seventy-two".