228525040 has 80 divisors (see below), whose sum is σ = 545054400. Its totient is φ = 89081856.

The previous prime is 228525019. The next prime is 228525041. The reversal of 228525040 is 40525822.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228525041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 636381 + ... + 636739.

It is an arithmetic number, because the mean of its divisors is an integer number (6813180).

Almost surely, 2^228525040 is an apocalyptic number.

228525040 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 228525040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272527200).

228525040 is an abundant number, since it is smaller than the sum of its proper divisors (316529360).

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

228525040 is a wasteful number, since it uses less digits than its factorization.

228525040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554 (or 548 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 28.

The square root of 228525040 is about 15117.0446847259. The cubic root of 228525040 is about 611.3800520084.

The spelling of 228525040 in words is "two hundred twenty-eight million, five hundred twenty-five thousand, forty".