228220736 has 28 divisors (see below), whose sum is σ = 465120228. Its totient is φ = 111025152.

The previous prime is 228220717. The next prime is 228220739. The reversal of 228220736 is 637022822.

228220736 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 2 ways, for example, as 191545600 + 36675136 = 13840^2 + 6056^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228220739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45821 + ... + 50556.

Almost surely, 2^228220736 is an apocalyptic number.

It is an amenable number.

228220736 is an abundant number, since it is smaller than the sum of its proper divisors (236899492).

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

228220736 is an equidigital number, since it uses as much as digits as its factorization.

228220736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96426 (or 96416 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 228220736 is about 15106.9764016497. The cubic root of 228220736 is about 611.1085601901.

The spelling of 228220736 in words is "two hundred twenty-eight million, two hundred twenty thousand, seven hundred thirty-six".