228634812 has 168 divisors, whose sum is σ = 716868096. Its totient is φ = 62355744.

The previous prime is 228634801. The next prime is 228634823. The reversal of 228634812 is 218436822.

228634812 is a `hidden beast` number, since 2 + 2 + 8 + 634 + 8 + 12 = 666.

It is an interprime number because it is at equal distance from previous prime (228634801) and next prime (228634823).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 469233 + ... + 469719.

It is an arithmetic number, because the mean of its divisors is an integer number (4267072).

Almost surely, 2^228634812 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 228634812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (358434048).

228634812 is an abundant number, since it is smaller than the sum of its proper divisors (488233284).

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

228634812 is a wasteful number, since it uses less digits than its factorization.

228634812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539 (or 522 counting only the distinct ones).

The product of its digits is 36864, while the sum is 36.

The square root of 228634812 is about 15120.6749849337. The cubic root of 228634812 is about 611.4779284717.

The spelling of 228634812 in words is "two hundred twenty-eight million, six hundred thirty-four thousand, eight hundred twelve".