228551904 has 144 divisors (see below), whose sum is σ = 753453792. Its totient is φ = 64364544.

The previous prime is 228551903. The next prime is 228551909. The reversal of 228551904 is 409155822.

228551904 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (144).

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 not an unprimeable number, because it can be changed into a prime (228551903) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 146392 + ... + 147944.

It is an arithmetic number, because the mean of its divisors is an integer number (5232318).

Almost surely, 2^228551904 is an apocalyptic number.

228551904 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 228551904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (376726896).

228551904 is an abundant number, since it is smaller than the sum of its proper divisors (524901888).

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

228551904 is a wasteful number, since it uses less digits than its factorization.

228551904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1649 (or 1638 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 228551904 is about 15117.9331920736. The cubic root of 228551904 is about 611.4040077642.

The spelling of 228551904 in words is "two hundred twenty-eight million, five hundred fifty-one thousand, nine hundred four".