228787400 has 48 divisors (see below), whose sum is σ = 536952240. Its totient is φ = 90651200.

The previous prime is 228787387. The next prime is 228787423. The reversal of 228787400 is 4787822.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16055 + ... + 26745.

It is an arithmetic number, because the mean of its divisors is an integer number (11186505).

Almost surely, 2^228787400 is an apocalyptic number.

228787400 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 228787400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (268476120).

228787400 is an abundant number, since it is smaller than the sum of its proper divisors (308164840).

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

228787400 is a wasteful number, since it uses less digits than its factorization.

228787400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10814 (or 10805 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 38.

The square root of 228787400 is about 15125.7198175822. The cubic root of 228787400 is about 611.6139291159.

The spelling of 228787400 in words is "two hundred twenty-eight million, seven hundred eighty-seven thousand, four hundred".