228531672 has 64 divisors (see below), whose sum is σ = 648345600. Its totient is φ = 74553120.

The previous prime is 228531671. The next prime is 228531701. The reversal of 228531672 is 276135822.

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 (228531671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1104 + ... + 21407.

It is an arithmetic number, because the mean of its divisors is an integer number (10130400).

Almost surely, 2^228531672 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 228531672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (324172800).

228531672 is an abundant number, since it is smaller than the sum of its proper divisors (419813928).

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

228531672 is a wasteful number, since it uses less digits than its factorization.

228531672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22573 (or 22563 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 228531672 is about 15117.2640381783. The cubic root of 228531672 is about 611.3859662155.

The spelling of 228531672 in words is "two hundred twenty-eight million, five hundred thirty-one thousand, six hundred seventy-two".