228473280 has 252 divisors, whose sum is σ = 914720040. Its totient is φ = 52190208.

The previous prime is 228473239. The next prime is 228473321. The reversal of 228473280 is 82374822.

228473280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (228473239) and next prime (228473321).

It is a tau number, because it is divible by the number of its divisors (252).

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 polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 140311 + ... + 141929.

Almost surely, 2^228473280 is an apocalyptic number.

228473280 is a gapful number since it is divisible by the number (20) 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 228473280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (457360020).

228473280 is an abundant number, since it is smaller than the sum of its proper divisors (686246760).

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

228473280 is a wasteful number, since it uses less digits than its factorization.

228473280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1656 (or 1636 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The square root of 228473280 is about 15115.3326129464. The cubic root of 228473280 is about 611.3338901509. Note that the first 3 decimals are identical.

The spelling of 228473280 in words is "two hundred twenty-eight million, four hundred seventy-three thousand, two hundred eighty".