228160820 has 12 divisors (see below), whose sum is σ = 479137764. Its totient is φ = 91264320.

The previous prime is 228160787. The next prime is 228160831. The reversal of 228160820 is 28061822.

It can be written as a sum of positive squares in 2 ways, for example, as 144913444 + 83247376 = 12038^2 + 9124^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5704001 + ... + 5704040.

It is an arithmetic number, because the mean of its divisors is an integer number (39928147).

Almost surely, 2^228160820 is an apocalyptic number.

228160820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

228160820 is an abundant number, since it is smaller than the sum of its proper divisors (250976944).

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

228160820 is a wasteful number, since it uses less digits than its factorization.

228160820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11408050 (or 11408048 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 228160820 is about 15104.9932141660. The cubic root of 228160820 is about 611.0550763191.

The spelling of 228160820 in words is "two hundred twenty-eight million, one hundred sixty thousand, eight hundred twenty".