228404736 has 240 divisors, whose sum is σ = 771554784. Its totient is φ = 63700992.

The previous prime is 228404723. The next prime is 228404747. The reversal of 228404736 is 637404822.

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 228404736.

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, 2354640 + ... + 2354736.

Almost surely, 2^228404736 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 228404736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (385777392).

228404736 is an abundant number, since it is smaller than the sum of its proper divisors (543150048).

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

228404736 is an equidigital number, since it uses as much as digits as its factorization.

228404736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201 (or 182 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 36.

The square root of 228404736 is about 15113.0650762842. The cubic root of 228404736 is about 611.2727488491.

The spelling of 228404736 in words is "two hundred twenty-eight million, four hundred four thousand, seven hundred thirty-six".