228217536 has 84 divisors (see below), whose sum is σ = 675298624. Its totient is φ = 73612800.

The previous prime is 228217529. The next prime is 228217573. The reversal of 228217536 is 635712822.

It is a super-2 number, since 2×228217536² = 104166487475822592, which contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 228217536.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11466 + ... + 24246.

Almost surely, 2^228217536 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 228217536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (337649312).

228217536 is an abundant number, since it is smaller than the sum of its proper divisors (447081088).

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

228217536 is a wasteful number, since it uses less digits than its factorization.

228217536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12830 (or 12817 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 228217536 is about 15106.8704899460. The cubic root of 228217536 is about 611.1057039546.

The spelling of 228217536 in words is "two hundred twenty-eight million, two hundred seventeen thousand, five hundred thirty-six".