228061720 has 32 divisors (see below), whose sum is σ = 513586800. Its totient is φ = 91145088.

The previous prime is 228061663. The next prime is 228061733. The reversal of 228061720 is 27160822.

228061720 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69967 + ... + 73153.

Almost surely, 2^228061720 is an apocalyptic number.

228061720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

228061720 is an abundant number, since it is smaller than the sum of its proper divisors (285525080).

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

228061720 is a wasteful number, since it uses less digits than its factorization.

228061720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4987 (or 4983 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 228061720 is about 15101.7124856753. The cubic root of 228061720 is about 610.9665943915.

It can be divided in two parts, 2280 and 61720, that added together give a cube (64000 = 40³).

The spelling of 228061720 in words is "two hundred twenty-eight million, sixty-one thousand, seven hundred twenty".