228788040 has 128 divisors (see below), whose sum is σ = 782732160. Its totient is φ = 52998144.

The previous prime is 228788039. The next prime is 228788071. The reversal of 228788040 is 40887822.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a plaindrome in base 14.

It is a zygodrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 228788040.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22207 + ... + 30833.

It is an arithmetic number, because the mean of its divisors is an integer number (6115095).

Almost surely, 2^228788040 is an apocalyptic number.

228788040 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 228788040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (391366080).

228788040 is an abundant number, since it is smaller than the sum of its proper divisors (553944120).

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

228788040 is a wasteful number, since it uses less digits than its factorization.

228788040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8671 (or 8667 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 39.

The square root of 228788040 is about 15125.7409735854. The cubic root of 228788040 is about 611.6144994162.

The spelling of 228788040 in words is "two hundred twenty-eight million, seven hundred eighty-eight thousand, forty".