228480660 has 36 divisors (see below), whose sum is σ = 693058548. Its totient is φ = 60928128.

The previous prime is 228480649. The next prime is 228480691. The reversal of 228480660 is 66084822.

It can be written as a sum of positive squares in 2 ways, for example, as 134235396 + 94245264 = 11586^2 + 9708^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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 11 ways as a sum of consecutive naturals, for example, 634489 + ... + 634848.

Almost surely, 2^228480660 is an apocalyptic number.

228480660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

228480660 is an abundant number, since it is smaller than the sum of its proper divisors (464577888).

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

228480660 is a wasteful number, since it uses less digits than its factorization.

228480660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1269352 (or 1269347 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 228480660 is about 15115.5767339523. The cubic root of 228480660 is about 611.3404723875.

It can be divided in two parts, 2284 and 80660, that added together give a square (82944 = 288²).

The spelling of 228480660 in words is "two hundred twenty-eight million, four hundred eighty thousand, six hundred sixty".