224171928 has 128 divisors (see below), whose sum is σ = 675864000. Its totient is φ = 68567040.

The previous prime is 224171917. The next prime is 224171929. The reversal of 224171928 is 829171422.

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

It is a junction number, because it is equal to n+sod(n) for n = 224171892 and 224171901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (224171929) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 149808 + ... + 151296.

Almost surely, 2^224171928 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 224171928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (337932000).

224171928 is an abundant number, since it is smaller than the sum of its proper divisors (451692072).

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

224171928 is a wasteful number, since it uses less digits than its factorization.

224171928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1562 (or 1552 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 224171928 is about 14972.3721567426. The cubic root of 224171928 is about 607.4731340047.

The spelling of 224171928 in words is "two hundred twenty-four million, one hundred seventy-one thousand, nine hundred twenty-eight".