228985380 has 240 divisors, whose sum is σ = 788889024. Its totient is φ = 55261440.

The previous prime is 228985373. The next prime is 228985391. The reversal of 228985380 is 83589822.

228985380 is a `hidden beast` number, since 2 + 28 + 98 + 538 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 79 ways as a sum of consecutive naturals, for example, 1747915 + ... + 1748045.

Almost surely, 2^228985380 is an apocalyptic number.

228985380 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 228985380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (394444512).

228985380 is an abundant number, since it is smaller than the sum of its proper divisors (559903644).

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

228985380 is a wasteful number, since it uses less digits than its factorization.

228985380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248 (or 237 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The square root of 228985380 is about 15132.2628843144. The cubic root of 228985380 is about 611.7902972420.

The spelling of 228985380 in words is "two hundred twenty-eight million, nine hundred eighty-five thousand, three hundred eighty".