228425440 has 48 divisors (see below), whose sum is σ = 542469312. Its totient is φ = 90893824.

The previous prime is 228425411. The next prime is 228425459. The reversal of 228425440 is 44524822.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 27897 + ... + 35143.

It is an arithmetic number, because the mean of its divisors is an integer number (11301444).

Almost surely, 2^228425440 is an apocalyptic number.

228425440 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 228425440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (271234656).

228425440 is an abundant number, since it is smaller than the sum of its proper divisors (314043872).

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

228425440 is a wasteful number, since it uses less digits than its factorization.

228425440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7459 (or 7451 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 31.

The square root of 228425440 is about 15113.7500310148. The cubic root of 228425440 is about 611.2912181226.

It can be divided in two parts, 22842 and 5440, that added together give a palindrome (28282).

The spelling of 228425440 in words is "two hundred twenty-eight million, four hundred twenty-five thousand, four hundred forty".