228580920 has 128 divisors (see below), whose sum is σ = 769089600. Its totient is φ = 60383232.

The previous prime is 228580909. The next prime is 228580943. The reversal of 228580920 is 29085822.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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, 121104 + ... + 122976.

Almost surely, 2^228580920 is an apocalyptic number.

228580920 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 228580920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (384544800).

228580920 is an abundant number, since it is smaller than the sum of its proper divisors (540508680).

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

228580920 is a wasteful number, since it uses less digits than its factorization.

228580920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2006 (or 1996 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 228580920 is about 15118.8928166053. The cubic root of 228580920 is about 611.4298804401.

The spelling of 228580920 in words is "two hundred twenty-eight million, five hundred eighty thousand, nine hundred twenty".